Pros
As some of the earlier reviews can attest, Mythic has gone through dynamic change recently--and it has emerged far the better for it. The studio is active and agile, and the leadership is trying very hard to be transparent. It is easier here than any place I have worked to expand one's role and try new ideas. The management hierarchy is very flat; there's not a lot of middle management, which means that communication is usually very clear. There is a strong sense of working together.
Cons
Mythic is now a mobile studio, and anyone who is looking to make the kind of games Mythic used to make (large-scale MMOs) should think twice. Also, because the studio's structure recently changed, things are moving very quickly and it can be difficult to keep up with all that's going on. All signs point to this being temporary, though.