Pros
The company is a leader in a high growth area (cloud), with a focus on bringing Enterprise applications (such as SAP) to the cloud. It's a mix of very smart infrastructure engineers, software developers, and business / tech savvy leadership. The rapid growth opens up new opportunities to grow and take on new challenges. Results are rewarded. Everyone works hard and brings deep expertise.
Cons
Start-up culture. Not a lot of structured roles -- have to be willing to adapt to the high priority needs, driven by customer demand. This is great for some , but not for everyone. Folks that come from a large company culture have trouble adapting. Even management roles have hands-on work ... Can't be afraid to dig in and get your hand dirty.