Awesome company to work for, they really do care about their employees. Lots of very intelligent talented people involved. I learned a great deal while working there and honestly can't say enough good things about Proof.
Cons
Wage was low. Requires a level of skill and effiency that the pay doesn't equal. As well as there isn't much room for advancement. For perspective the company I work for now pays me double what Proof did for the same required level of skill.