We went to KJ inside the RIO Hotel and Casino. I think they have couple other locations in Vegas.
We were looking for a place for dimsum and the Chinese dealer at Bally's recommanded KJ. We were there around noon on Monday and waited for about 10 minutes for a table. There were a dozen people before us and the wait wasn't too bad. Once inside and seated a waitor came and asked what type of teas would we like and we order the usual iron buddha tea. The seating is confortable. Tables ae well spread out. Did not feel crowded although the place is pack. The dimsum was suprisingly good. I think better than Ping Pang Pong at Gold Coast. The food tastes freshly made and flavorful.
Once thing I noticed that set this place apart from many others is that the waiters come to check on the tea pot quite often which is a good thing because usually you have to call them to refill the pot. Didn't have to at all at this restaurant. Service was fast and courtesy.
Did not go there for dinner so can't say if the experience would be the same.
Next time in Vegas, definetely will go there for dimsum.