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Best book on Design Patterns(Rating: 5)
Simply, this should be the book to buy if you want to learn OOP design patterns.
You'll like it even you don't like reading
Its in Java but also great for other oop languages, like c# or Action Script 3.

Awesome content(Rating: 5)
A must have for any Developer and Architect, its very complete and written in a (you-will-learn-you-like-it-or-not) way that anyone would love, as long as you do the exercise...

Brilliantcaba(Rating: 5)
Great, faboulous, brilliant!

This book was exactly what I was looking for.

It envolves you from its beginning and keep you reading about design patterns, object oriented principles, rubber ducks, MVC, ... until the end of the book.

An excellent way to learn GoF's design patterns, the quality of the content keeps on really high until the last page, something very difficult in these kind of books. Funny, straight forward, clever...

I've read the original Design Patterns book by Erich Gamma, and honestly, it was very difficult for me to understand it. Now, after getting a clear vision about design patterns thanks to Head First Design Patterns, I'm going to give it a go again..

Looking forward to reading another book from Head First series.

Yes, it's "Design Patterns For Dummies" - but in a good way!(Rating: 5)
If you're an OO programming beginner, this book is the perfect introduction to the main design patterns. It steps you through each one in such a clear way, you'll blast through it in no time. There's an awful lot of repetition and a crazy amount of whitespace (the book could have easily covered all of its content in less than half the number of pages), but it's such an easy read it really doesn't matter - and there's even a fair bit of humour in there to keep things entertaining.

Read this, then get the "proper" one by Gamma et al.

Good for beginning(Rating: 4)
I really liked this book and I would suggest it to anyone not knowing what a design pattern is.
On the other hand it is definatively not worth buying if you are and advanced user, looking for
new patterns, as this books covers only some of the most common ones.