Pros
It's Apple, with AppleCare growing at breakneck pace to support customers. Decent discounts on Mac and iOS devices.
Cons
It's Apple; everybody and their brothers uncle's dog wants to work there, as a result there is tons of competition. I recall them stating that only 2% of applicants get a job there. As a result, don't expect top notch pay or benefits. AppleCare is open 365 days a year, so don't expect to be able to spend the holidays with family and friends. They don't give support advisors who support the iPhone an iPhone, as a result many advisors supporting the iPhone have never used one. At best you may be provided an iPod Touch, but that's a total different user experience. It wasn't until I bought my own iPhone that I was able to competently support it.