I just started toying with it over the weekend. I like how you can set it up where the player takes charge of the computer and sends the data directly to my sound card. Using the program that way, it sounds better than WMP on my system.
It also looke like it is a bit easier to edit, a big plus if you have a big collection. I know many of you use Foobar, but I do not wish to go to the trouble of learning it. What do you think of I-River Media player? If you have not heard it, it is free to try, give it a listen and report back please.