said by Matt :

I've been more and more dissatisfied with iTunes (the application itself - it's bloated and ungodly slow)...
...I've wanted to do that for ages anyway as the iTunes application has always been awful.

said by peter_m :

It is sometimes slow, specially on low ram, slower CPUs... but AWFUL it is not... iTunes and it's ease of use, it's proper integration with the iPod and the convenience of the iTunes music store have been a big part of the iPod's success... last I checked the iPod is the best selling music player... iTunes works fine!