Pros
You won't find a better culture anywhere else. Management does an amazing job of developing your skills and getting you on track to reach both your personal and professional goals. This is truly a place where if you work hard you will be greatly rewarded!! Also there are a lot of brilliant people with unique backgrounds at Power, its fascinating.
Cons
The only "Con" I can think of is at times, especially if you're not an outgoing person, the work culture can feel a little "Cliquish". My advice for that is push yourself to socialize, networking is very important, especially at Power. Also if you don't like working with young people this might not be a great fit as the majority of the employees fall within the 20 - 30 year old range.