I worked at Sully for about three years as an intern (and eventually full time).
My last day was actually my birthday! Being part of such talented people made me feel right at home even though it's been less than two months since then. They have some really cool projects going but they don't stick around long enough after you've left so try not to get too attached if you end up leaving early - just make sure your boss knows how much extra work he/she has already put into making their project successful! The team atmosphere there is great; everyone gets along well together regardless of different backgrounds or personalities. It helps because we're all working towards one goal which makes us come closer to each other instead of being stuck behind our desks alone trying to "get things done".