J.D. Power is a 30 year old company that never found it's place in the information age. The original family sold it off a decade ago, and it was recently spun off again to an Asian holding company. I wouldn't be surprised to see it change hands again within the next few years.
Actual work culture was fine. Pay and benefits were middle of the road. IT processes and development style were at least a decade and a half behind the times. But I've seen worse.
All in all, "it's fine". But I wouldn't hang your hat there for too long.