I would give them 2.5 stars. We did a last minute teppan date. There was just one other couple at our table. Our chef was very good, but since we were a small table and the older couple with us didn't interact with him at all, so our "show" wasn't the best I've ever seen.
The food was typical, miso soup, salad, 2 shrimps each, choice of protein, and choice of rice. The food was adequate, good, but not great. My steak was a bit tough even though I ordered medium rare. If in the the far west valley it's a nice change of pace, but nowhere near as good as my personal fave sapporo in North Scottsdale.