“If you don't have a chance to explore the real North-East”
It may have been original once (I came a few times more than 10 years ago), but now it's just a place for tourists to get a taste of the food and culture of the North-East. The decorations and the show (dance, song, traditional instruments) provide for a local atmosphere, except when they sing some Japanese (!) songs for the many groups of Japanese, and unfortunately they ask the audience to join them in some games and (fake) ceremonies.
My Thai friends thought that most of the food was okay, only the som tam and yam (spicy salad) were a bit off: one was far too sweet, another one so spicy it was inedible even for them. I myself enjoyed several types of fish, vegetable dishes and tongue, and for fun you could try some really local dishes like friend egg with ants eggs and fried frog.
Prices are quite high, service is excellent.