for me itunes is the worst music player out there, on Windows
1) It only playes 2 formats, mp3 & mp4 (AAC)
2) a real memory hog, 40 MB when playing mp4 & minimised to tray, now i don't know whats inefficiant, Apple's programmers or Windows port, can't be Windows fault, as there are so many music players out there for Windows which work in a far better way then itunes
3) Album search etc, well...won't talk about that, i only got 110 songs