I do use them, but I avoid them where I can. I have an Android tablet with keyboard, and it plays any movie type I choose, not just Quicktime.
Honestly, I hate the arrogance of Apple and their staff. The service in the Apple stores is appalling, and the prices just astonishing. £12 (that's roughly $20) for a USB cable!
I just had a friend telling me another horror story of Apple Store staff today, where they refused to serve him as he had left the store during his appointment so his appointment was "over", even though it was them that had sent him out of the store to get something.
Plus anyone who thinks it's OK to actually require you to make an appointment in order to get one of their products fixed is on a different planet anyway. Quite why we have allowed them to get this arrogant is unknowable.
And lastly, because you've got me started now, shall we look at the astonishingly poor software they produce? Sure, the hardware is shiney and, er, white (that was their genius - they made hardware white, wow what a breakthrough). But the software?
Anyone used Safari? Terrible. QuickTime? Terrible. iTunes? So terrible words fail me. A system that installs content twice when you copy it over, but offers no way to delete delete duplicate content easily. Genius.
Oh, I could go all day.
And before I get written off as a Windows nut, ask me what I think of Windows 7? ;-)