Pros
If you know how to work the system and play office politics, you can move up very quickly here. In general, GUESS employees are very passionate about their work, and they usually have the power to implement change without very much red tape. Entry level employees are not generally expected to work long hours, although managers and above are. Plus, it's fun to work for a sexy and fashionable company that all your friends know of. Benefits are pretty generous, and perks include an on-site gym, cafe, casual dress code, and 40% discount.
Cons
If you're not comfortable with a political environment, you won't succeed here. There's not much teamwork; it's a very competitive place to work. Paul and Maurice Marciano can be very difficult to work for if you have a lot of interaction with them, and, yes, they have been known to make decisions based on a whim or personal feeling. They are brilliant business people, but tend to get into the details of the business, instead of focusing on the bigger picture.