I've been past this place numerous times and it's always busy, so I thought I'd take the GF there for a treat.
It's outstanding! You can get both Isaan hotpots and BBQs to cook at table.
We ate like a pair of pigs, got through a pitcher of Chang and a large Leo and the bill was barely over 400 baht.
Chorkun's does not announce itself in English, only Thai. Turn into Srisook Road at the statue of the old king and it's your first big eatery on the right, not far from Caltex.
Arrive early to avoid intense disappointment. We arrived at about 8pm on the second visit and all of the fresh oysters and BBQd prawns had gone. (Still a great meal though!)