Pros
Fairly sharp crowd of individuals genuinely interested in doing the right thing. Biggest Pros also tend to be biggest cons. Riot is a company big on alignment, and several leaders in the company believe the true accountability mechanism is self-accountability. As a result, a lot of energy is invested in making sure the WHY of any action is understood. Unfortunately, it means little forward progress is visible until a critical mass in this area is accrued.
Cons
It's the games industry. While Riot compensates competitively, it is not going to keep up with the craziness that is occurring in the Silicon Valley. Located in West LA means a Rioter chooses either to accept a smaller place to live or have a longer commute. These are first world problems, and ideally candidates are cognizant of this trade off as they join Riot.