They've been there for some years (at least 10-15 in Indiana) - I lived there, though I think it has been at least 10 years since I've been there. I remember being somewhat disappointed the last few times and it was generally difficult to get beverage refills often enough. I'm not sure they are "quality".

The best I've had was an Indian buffet in Indiana and a hotel's breakfast buffet in Amsterdam. I woke up to eat breakfast there.