Pros
The growth. Personal growth potential has historically been great. Fast company growth has created opportunities one wouldn't get anywhere else. Free lunches are provided daily, along with gym and fitness classes. Food trucks stop by several times a week for something different, and recent announcements reveal huge development plans around the campus (hotel, restaurants, etc.). Mid-size means access to executives is still a reality. Outside hires in high positions may change the culture...things like working from home could some day become possible.
Cons
The growth. Some departments are understaffed, others are overstaffed. Executive access is still available but is decreasing. Inability to make decisions without director and executive involvement. Trend of working with biotechs creates micromanaging monsters on the sponsor side, operationally. Size is still small enough that the client has direct executive/CEO access to complain about you personally. With the exception of CRAs, the training is inadequate, at best. Flexibility is a coin toss--just depends on who your supervisor is. Overall morale is very mediocre. Compensation is good but certainly not fair considering the stress and demands of the job.