Pros
Fast growth has been exciting with lots of interesting challenges. Nice office, good benefits. Opportunities exist if you want to excel. Courtesy of the economic conditions the mentality of "We can't change - we've always done it this way" is going by the wayside. Ideas that were dismissed a few years ago as "too new" and "not the way we've done things in the past" are now being implemented. Processes are being cleaned up and improved. It feels like a positive change.
Cons
The biggest downside is that fast growth of the company in the past has outpaced the processes that were in place, leaving people ill-equipped to do their job effectively. Many inefficient processes sap energy and morale, and fear of changing these processes results in resistance.