Have been here a couple of times in the 4.5 years that I have been in Madison. The first time I was here was definitely not planned. My roommate and I were heading to Saigon noodles, but they were super busy one evening (before they renovated and expanded the area), hence we stopped by Sai Bai Thong. I have had the pineapple dried rice, which was a pretty nice and interesting dish. The fried rice was contained in the shell of the pineapple instead of on a plate. The natural pineapple flavors infused into the rice, adding a truly refreshing taste to it. I am not sure if this dish is still being served, that was one of their specials some time back.
Today I dined in again and had the duck curry. Serving is decent and our waitress was good. But I find that the curry is a tad too salty for my taste. Given the price range and the type of food this is not one of my regular go-to places, but once in a (long) while, if I am looking and looking for a place different to eat, I would give it a go.