Pros
The pay is really high compared to banks and other companies in energy for risk. Salaries are at the top of the range and bonuses are usually in the 15 - 33% range depending on your grade. Benefits are really good (pension, 401K match, insurance). The people generally are very bright.
Cons
You probably will be doing the work of people at other companies that get paid a lot more than you. So you'll get high pay, but you'll be doing 2 jobs at least with one of those being little different than the next pay grade higher. That means you can be worked to death at times - not enough time to do both jobs in a day. Feels like an investment bank - everything is the #1 priority, everything is always put on the fast track, seems like you have a million bosses everywhere telling you what to do. Kind of flat organization which can leave you confused as to what you are supposed to be doing.