This is a very well made and rugged CD holder. The pages have wide binding rings allowing them to be easly opened flat - something i've found to be a problem on some other CD books. The rings can all be unclipped at the back for re-ordering which is a useful feature and easily done without compromising the strength of the binding.
In addition to the 128 CD sleeves in the book (16 double-sided pages, 4 CDs per side), there are an additional 16 pockets at the front to give a total of 144. This front section also unclips and can be taken out of the main organiser to fold into a separate 16-CD pack, ideal for the car, or where you don't need to take your full collection.
I've filled two of these, have a 32 capacity one for my car and have already ordered a further two 128s, though they are also available in a 256 capacity version. These organisers have an attractive black nylon outer, but other versions are available with a classier, if slightly more expensive, Koskin finish (my car organiser is this finish) probably more suited to a living room.