Vantaggi
The Benefits package is certainly worth working for if you are a permanent employee, though as a consultant/contractor (one of many!) I did not receive this. The pay was fair in regards to the level of experience which I had at the time. As well, the emphasis on and support for professional development at higher levels is quite good, though this was only uncovered by fluke in my position.
Svantaggi
The corporate culture is fairly bleak, as most people don't seem to take any pride or joy in their work. This is translated into a negative work environment, and can make working rather unpleasant. As well, there is a disconnect between senior managers and middle managers, whereby middle managers are able to get away with exploitation of those under them by virtue of SMs not being involved in or aware of the work of MMs.