Pros
I loved Conde Nast. I worked there fore 3 years as an Account Manager and then Sales Development Director. It is an extremely challenging, demanding job and you are expected to be out on calls 15 x per week. Late nights and dinners. I loved it but its not for everyone. You need to have alligator skin and you need to be strong, on your A game ALL the time, and ready to put the time in. As long as your publisher is working for you and not the other way around you will survive and THRIVE. When your management likes you....they pay you....A LOT.
Cons
The pressure to perform can be crushing at times. You are expected to be absolutely excellent every day and also be prepared to spend heavily on your wardrobe. you need to look the part too and if you don't look the part you wont last long. The brutal truth.