Pros
I've been with Apple for a couple months now as a Specialist (basically, the front lines of Apple retail stores). The workplace is great. The people are super friendly. Even though I've only been there a short while, I've already made friends within Apple. Employees are very open and helpful to newbies. They'll role-play with you, give you feedback about how you're doing and suggestions for improvement, and on my first day my colleagues even inited me to lunch with them, which really helped break the ice and made me less nervous. The pay is decent, managers are competent and considerate, and you really feel like you're part of a family.
Cons
Like any retail store, you occasionally have to deal with arrogant, stupid, and belligerent customers. It works out well, though, because the other employees and managers are very helpful in dealing with the aforementioned customers. The pay isn't great, but I'd say it's a little above typical retail hourly rates. As part-time, you don't get health benefits until after you've been there for a year.