Personally, I’ve been screwed over by Apple enough times to know it’s never worth it to be an early adopter with their products. But grouchy industry geezer Bob Lefsetz jumped right into iTunes Plus, and was not impressed:
“When I go to buy a car, they don’t say if I want to LOOK at the one loaded up with options I can no longer look at the base model. Unless I remember that there are multiple levels and I go into the manager’s office and sign a waiver. And then I can’t look at the EXPENSIVE version unless I go back into the office!”
As with most software, it’s a good idea to wait for that inevitable bug-fix release before installing anything.