Why do people hate iTunes, especially PC users, for ripping CDs? I'll tell you:
No error correction.
If you want 100% accuracy in your CD rips and corrections made if there's a sudden jolt or a speck of dust on the CD and you want it to re-read so you don't have a click-filled sound file, you gotta use Exact Audio Copy for Windows (some people have managed to get it working on Mac under emulation, but I never could). The Mac equivalent would be a program called Max. It has some error correction, but I don't think quite the level of EAC.
Mind you, most of the time if I'm importing into my iPod I DO use iTunes to rip, but if I'm doing a lossless rip I'll definitely use Max because if I'm doing lossless, I want it to be as close to perfect as possible.