I NEVER, I mean NEVER do not tip. I was a waiter, my brother and father own restaurants, and I tip no matter what.
This food at Siam Best was so bad it's not worth carrying on about -BUT I MEAN IT WAS JUST AWFUL so we sent it back- or tried. She wouldn't take it. She left it on the table telling me "You Pay! You Pay!"
"Bring me the check and I'll pay." my girls got up to go and she gave us the bill. We didn't eat anything- NOTHING. Paid the entire bill, and only because I just feel like you have to, you just have to, I left her a tip. Less than 10%, but did it anyway.
THE FOOD SUCKS AT SIAM BEST.