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SleepSoul Heaven Super King MattressThe SleepSoul Heaven mattress puts comfort first. Indulge in multiple layers of plush foam for a deep, restful sleep. The Heaven mattress includes 1000 individual edge to edge pocket springs to support your body in any position. So whether you're a toss and turner, a duvet hogger or a belly flopper, you're guaranteed a comfortable night's sleep with SleepSoul. The 2cm layer of coolgel allows your body to sink deep into the mattress. It moulds to your
The SleepSoul Heaven mattress puts comfort first. Indulge in multiple layers of plush foam for a deep, restful sleep. The Heaven mattress includes 1000 individual edge-to-edge pocket springs to support your body in any position. So whether you're a toss-and-turner, a duvet hogger or a belly flopper, you're guaranteed a comfortable night's sleep with SleepSoul. The 2cm layer of coolgel allows your body to sink deep into the mattress. It moulds to your sleeping position, helping relieve pressure off your muscles and joints, and even spreads your weight evenly to prevent you from rolling around. And if that wasn't enough, we've added a luxuriously soft euro top for even more comfort. Sewn flush with the top of the mattress, the eurotop adds a seamless layer of high quality foam. It really must be felt to be believed. We’re pleased to announce that the SleepSoul Heaven mattress has been endorsed as a Which? Best Buy. “The SleepSoul Heaven is an excellent, pocket sprung mattress that combines decent overall support with durability – which means it won’t sag or soften over time. It’s one of our highest-scoring pocket sprung mattresses” say Which? The Heaven mattress was put through several tests and scored 5 out of 5 in all durability tests, including “change in height”, “change in body support”, “change in firmness” and many more. This well-built mattress will give you excellent body support, regardless of the position you sleep in. It’s particularly good if you have a smaller body type. Importantly, our durability testing also revealed that support doesn’t reduce over time, and neither does this excellent mattress sag significantly as it ages, ensuring that it’ll give you years of service without losing height. The Heaven mattress is vacuum sealed and packed into a box for freshness and convenience. All you need to do is take it out the box and remove the inner plastic wrap. Like magic, your new mattress will start to take shape. In 2 hours, it will be good; in 24 hours, it will be great. All our pocket-sprung hybrid mattresses come with a 10-year warranty as standard. Enjoy 10 years of comfort with your Heaven mattress.Range Name: Heaven
Filling: 1000 pocket sprung Coolgel
Is Assembly Required: False
Product Warranty: 10 year
Height (cm): 25
Length (cm): 200
Width (cm): 180
Bed/Mattress Size (cm): 180
Bed/Mattress Size (Type, ie. king, double etc.): Super King
Bed/Mattress Size (Feet): 6ft
Box 1 Cardboard (KG): 3
Box 1 Depth (cm): 31
Box 1 Gross Weight (kg): 37
Box 1 Height (cm): 31
Box 1 Net Weight (kg): 33
Box 1 Plastic (KG): 1.8
Box 1 Volume: 0.14
Box 1 Width (cm): 185
Is it fragile?: False
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4.8 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 1
Light on substance and heavy on flaws
Format: Paperback
The book has a great list of topics, but fails to provide much substance any of them.
Most of the provided code is just comments that avoid the actual crux of the issues being discussed. (e.g. #implement the logic to validate XYZ - while the whole point of this chapter is teach how the heck we validate XYZ!)
Some parts are plain wrong, for example the part on Graph based RAG is fundamentally flawed as it assumes the text embedding and the graph embedding are in the same latent space. (This is one of many more examples).
Seems like the book was rushed, and the author has limited hands on experience (if any).
At least we know based on the amount of flaws that it was not written by an LLM
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Reviewed in the United States on December 31, 2025
★★★★★ 5
Excellent book to truly understand LLM design patterns
Format: Paperback
I just finished reviewing Ken Huang's pocket book on LLM Design Patterns, and WOW what an amazing resource! This book is excellent if you want to truly understand how to create and enhance intelligent AI language models, all that in your pocket!
Ken makes the difficult things seem surprisingly easy, and that's the real MAGIC.
- How to prepare your data for training by making it extremely clean.
Developing the brains: the practical aspects of training, optimizing, and maintaining your models.
- Learn amazing prompting techniques (such as Chain-of-Thought and Tree-of-Thoughts) to improve your AI's reasoning and problem-solving abilities.
Learn everything there is to know about RAGs so that your LLM can incorporate outside expertise.
- It also delves into creating "agentic" AI that is capable of action and planning (not only simple plan and execute but also enhanced techniques like ReWoo!)
Really, this feels like a useful toolkit, so Ken thank you for that resource
Thanks, Idan Habler
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Reviewed in the United States on June 9, 2025
★★★★★ 3
A Broad Overview, But Light on Modern Fine-Tuning
Format: Paperback
I'm currently really interested in fine-tuning LLMs and recently completed my first LoRA-based fine-tuning on a quantized model. I came to this book looking for more detail on fine-tuning. While it touches on the topic, I found the content didn’t quite align with the current state of the field in 2025. Techniques like LoRA, QLoRA, and PEFT weren’t really covered, and the material leaned more toward what I think are older or lower level approaches. That made it harder to connect with what I’m actually working on.
That said, when I shifted to other chapters — like the sections on prompt engineering techniques such as Chain of Thought (CoT) and Tree of Thought (ToT) — I found more value. These sections were clearer, and I picked up a few practical insights, like using few-shot examples that walk through the CoT reasoning process. That’s not something I’ve tried before, and I can see how it might help smaller models that struggle with any type of reasoning tasks.
Overall, the book feels more like a broad overview of all LLM concepts. For someone exploring many topics across the LLM ecosystem, it offers a wide-ranging introduction. But for readers like me who are actively trying to learn and apply techniques like fine-tuning and quantization, it may leave you wanting up-to-date guidance.
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Reviewed in the United States on August 10, 2025
★★★★★ 5
Great foundation read for security!
Format: Paperback
This book is a great read! It builds a strong foundation and I would highly recommend it for builders who are interetsed in building on LLMs and ensuring everything is secure. Security is super important and this book does it justice!
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Reviewed in the United States on June 27, 2025
★★★★★ 5
Loved it
Format: Paperback
I’ve easily read dozens of tech books. I liked this one a lot. Sure, there were boring parts, but most of it was engaging, especially on dry subjects. I previously read “How AI Works” and found this more informative and way more enjoyable. I got through the 700 pages in about 5 weeks while also learning about probability and linear algebra from other books and online sources. I’d love to read something more advanced by the author, maybe getting into more modern applications. I feel more comfortable with the subject and feel I am now ready to conquer more advanced texts. I initially picked this up to give me some background before reading “How to Build a LLM (from scratch)”. I’ve ordered an intermediary Deep Learning with Python book as well, but wouldn’t mind a more advanced theory book to accompany these books. I’ll definitely be rereading sections of this book to further familiarize myself with topics like backpropagation. Highly recommend if you’re looking for a gentle, but broad introduction to the topic.
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Reviewed in the United States on November 14, 2025