Pros
You get to work with not only incredibly smart people, but incredibly caring and passionate people. The pay is phenomenal and the work is fun to do on a day-to-day basis. As a software developer I get to collaborate with my team on things I design and things they design. We implement alongside each other and we test each others work and we have fun doing cool things. The food here is amazing and I can't imagine anywhere else having this high quality of food from coffee carts through lunch.
Kontras
You become an expert in development languages that aren't being used by anyone else in the 'tech industry', so your experience does fall behind professionally in that respect. However, your ability to think algorithmically and be an intelligent computer scientist is not hindered.