Pros
I proudly worked at Gimmal for almost seven years. While I did leave Gimmal, I left for a new and different career opportunity outside of consulting; however, I am convinced I would not work for another consulting outfit other than Gimmal. While Gimmal is a smaller organization, that is exactly one of the reasons I left one of the largest, global consulting outfits for Gimmal. Gimmal gave me opportunities to get closer to the operations and decision-making processes of the business, thus I was able to grow and evolve my career enhancing the technical consulting skills with additional managerial and leadership skills. Through Gimmal, I was also able to get involved in the Houston community (e.g. AIIM, ARMA, and the Houston Livestock Show and Rodeo). I can confidently recommend Gimmal as a fine place to work, enjoy, and build one's career.
Cons
Honestly, not too many cons to speak of. No organization or person is perfect. Maybe a little more team building (e.g. retreats, socials) on occasion. Long-running projects can mean some people don't see or meet one another for quite a while.