I had a hot stone bibimbap twice. The first time I got one it was pretty good, and I was impressed by the decor/cleanliness/service.
However, the second one I had was overly burnt (it was burnt when it got to my table, I started mixing it and a lot of the rice was already black). I was one of the few in the restaurant so it's not as though they messed up due to stress/business or anything. Two other people in the restaurant also ordered bibimbaps while I was walking out, and I could smell the burnt rice on those as well.
Probably not coming back.