I came across this book by accident at a local book store. I've seen many different guitar chord charts (and posters) both online and in print - but I bought this one because...
1 - I'm a beginner for the most part (I play rhythm guitar/chords mostly out of easy guitar or fake books, and I can transpose some of the music on the fly so that I can sing with it)
2 - The fingerings in this book are all for the first 4-5 frets (I'm not good at barre chords yet)
3 - It is thin enough to fit underneath my guitar in my case
4 - It was only $3 (retail)
I've only used it a little bit and I'm very pleased with it.
Please be advised - this is a BOOK and not a poster chart. It has all the keys (A, A#/Bb, B, C, C#/Db, D, D#/Eb, F, F#/Gb, G, G#/Ab) and traditional chords: major, minor, 7th, sus, major 7th, diminished 7th, (and a couple others I'll add later).
If you are playing easy guitar - then this is a good reference. I like it better than the Incredible Chord Finder (also by Hal Leonard) because the printing is black on white (no grey), the book lies flat when open, and the other reasons I mentioned above (no barre chords ... no really advanced fancy chords).
This book won't appeal to everyone, but I'm very pleased with it.