Pros
experience, money, benefits, travel. You get to experience a wide range of clients, industries and companies and life is rarely boring.
Cons
travel, cog in the machine, have to play the game to succeed. If you want to gain a few years of big 4 experience and then go elsewhere its a good place to work for a couple of years. Also, if you want to go down the partner track and rise through the ranks its easy enough. However, if you just want to be a strong performer and avoid the business development side and instead focus on the technical side you soon get lost in the mix and forgotten about. On the advisory side the firm is more of a large pyramid scheme where sales is definitely more important than the actual product but as long as the clients continually hire in order to show there stockholders that they are hiring the best then the game continues.