I have the 30GB photo. I don't think they make it anymore. But 16GB is holding about 320 CDs and 50 CD singles. Give or take a dozen albums I borrowed and imported. There is an iTunes setting that allows you to use your iPod as a portable drive. The instructions just recoomend you use the eject function before disconnecting it from the PC.
These thing are going to replace car CD changers. I used the cassette adapter at first, now I use one that plugs into the changer, and charges the iPod. The track controls work on the in dash stereo, and the iPod controls still work. www.crutchfield.com will give you detailed instructions on taking apart, and re-installing your dashboard if you buy from them.
I can't compare it to other players since this is my first MP3/4 player.
My gripes are:
Everytime you install iTunes it jacks up other burning software (They can't find the drives) and you have to re-install them
What I like:
You'll never drive away and think "Damn I wish I brought that one CD". I haven't broken a jewel case since I got it.