Pros
For any manager, the way to succeed at Apple is to be seen to conspicuously innovate. Good managers tap into the talents of those who report to them so that the whole team is seen to succeed and innovate. Managers get substantial authority - it's very top-down - so if you get a good manager things will work well for you. If you are considering a position at Apple, learn as much as possible about the managers you will report to, as they will make or break your experience.
Cons
The hypothetical "good" managers referred to in the Pros section are uncommon. Much more common is the sort of manager who feels insecure and considers his/her reports to be competitors, and prevents them from contributing effectively. Such managers feel under pressure to provide all the innovation themselves, and actively suppress anything from below. Of course that won't stop them from giving their reports negative performance reviews for failing to innovate. If you get this sort of manager you will find you have no voice. If you are considering a position at Apple learn as much as you can about your potential managers, try to find out which sort they are.