The A2 uses drag and drop to transfer files. It shows the ID3 info when you're playing a song, but you can't sort/browse using it. Files are sorted by filename / directory (though it only shows the music files when you're in "music" mode).
If you're used to an IPOD, you'll probably miss that stuff. Not me. I actually prefer filename browsing, but you'd think the designers would give you the option. I think the X5 is better about this, but I don't have one of those, so I can't say firsthand.
The A2 is primarily a video player, and that's what it does best. Video is great on the small screen, and even better when outputted to a TV. It is very good about handling almost every avi codec, and it's the only one I know that can handle AC3 sound (which is what a lot of people use when ripping HDTV and DVDs).
If you mainly want a music player, there's a bunch of better options.
Things I don't like about it:
-The cheesy USB host (slow, one way, not compatible with lots of stuff). The X5's host is much better by all accounts.
-Doesn't support "motion jpeg" video codec (from my digital camera).
I'm sort of late to the PVP game. Recently I decided that I actually do need a PVP, do to the fact that I will be traveling a little bit more often thanks to the army reserve. So I started looking up the archos players first. 5 hours battery life, very sad. Creative vision 4.5 hours, even sadder. Then I stumbled on the Cowon A2 perfect! Now this is a PVP! 4" screen, 10 hours video playback and 18 for music! It supports mp3 and mpeg4 and that's what I really care about. All I have to say is wow. Great player.
Now on to my question for anyone who owns a cowon A2 what kinda software am I dealing with? Is this drag and drop or can I use wmp 10? Are thier other third party software out thier? To bad I can't use it like an iPod and sync it with iTunes that would be perfect!