I don't get over to the East side enough to declare this the best Thai food in Madison, but it is definitely the best on the West side. Don't go if you're expecting spotless tables and smooth service (but it's still very friendly service, and certainly not bad service). The last time we were there, when the curries came out mixed up vs what we ordered we were told "oh... sorry... my mom got confused when she was making these..." (we told the guy it was uncool to throw mom under the bus. Everyone still liked their curries!) The Thai iced tea is made fresh from hot brewed tea (I love it... a friend didn't care for his... its pretty strong, almost like coffee). I usually get the fish curry, and if you tell them "I want it spicy" they make it spicy.
I think there are 2 tables for 4, and 2 tables for 2. But they never seem to be that busy so eating in (lunch) has not been a problem.