Solid home-style cooking.
My wife and I travel extensively and love Thai food. We tried this restaurant because it had a four star rating (who gave it four stars?). The decor was basic but no problem if the food were wonderful. We tried the salad - quite adequate and then the chicken satay. It was fairly disappointing. Following that we had the pork ka pow, which I think they called basil sauce? It was really ordinary. The third dish was a steamed seafood combination. The sauce was tasty but again the dish was fairly basic.
Our gold standard for Thai cuisine is Ayara Thai, near the airport in Los Angeles. The food there is very fresh and gourmet. Overall Wattana Thai has solid cooking, with fresh ingredients, if you're looking for basic recipes. We were hoping for more gourmet tastes, so we were disappointed. The service was good and the prices were reasonable.