I have been eating at Siam for several years now. I don't think I've ever had dish that wasn't top notch. The sauteed Basil dish and Rama delight are standards for me. The Thai fried rice is great - very subtle but spot on. They do great seafood too. And even if you'd had Pad Thai till your sick of it, theirs will still make you smile.
Pros: Can't miss menu, great service, on the Square, delivery
Cons: nothing I've found yet in seven years