Chez Siam is probably my favorite restaurant in Marlborough. My wife and I come here often and have never had anything we didn't like. We typically stick to pad thai (or basil pad thai) or fried rice, but we've also brought several people visiting us who've tried various other things and all have said it's good including some of our more food snobbish friends. I see other people complain about the service in some reviews, but I really have no idea what they're talking about. The service has always been friendly and incredibly fast with us.