I don't like itunes at all. It installs 3 services, and I don't even have an ipod. My wife uses itunes, but then her music sometimes cannot be played in another PC(not even with itunes)
She probably has DRM by default. She was actually quite upset that there is about 4 GB of music that she copied from her older laptop and cannot play in the new one. Not to mention all the stuff that she downloaded from itunes and cannot play anymore. She used to buy all her music from the itunes store, now she has not buy music in a year.