If you're looking to download music, this is your program. You are presented with a very large server list with the user's name, number of files, total size of files, and ping (the time it takes for a packet of data to be sent to that person's computer and be returend -- the lower the better). I've downloaded more music in the past hour than I have been able to in the past two weeks with any other program.
If you're looking for movies, this is not what you need -- unless you're looking for filth. Same with files (sit, zip, etc.) -- there aren't many to choose from. Hopefully they will implement file searching, specifically, in the future. (It now has the option to search for Audio, Images, Video, or All.)
(note: I have OS 10.1.5 and the program works perfectly.)