Pros
I have been working for 318 for about three years, and the thing that stands out the most is the quality of the team that surrounds me. There are clearly strong friendships at all levels of the staff, and it's reflected in the work. It is also one of the few places that you can find the highest levels of expertise on the Mac, PC, storage, and networking sides of the field in the same organization. From a team member standpoint that really puts you on solid footing with the confidence you need to finish projects and follow through with that team, as well as learn from them. The culture also encourages strong and straightforward communication of both accolades and concerns, which I find very refreshing.
Cons
As with any consultancy, the demand can be strong at times, and it becomes important to develop the necessary skills to handle those trials. Gaining a strong understanding of tools, systems, and your peers early on can help to ease that. I also think that continuing to develop and define the system of routes to resolution with any kind of staff concern will help to improve the speed with which those concerns can be resolved. In my personal experience, the open door policy of a small business has honestly been wonderful, but I think that for different personality types a more clearly defined system would be helpful and comforting.