I know I can rely on chowhound members for a good advice. Can anyone recommend a good dim sum place in NYC where you don't feel rushed by waiters or can actually have conversation without screaming at each other? Most of all, it has to be clean. Most of the time those elements turn out to be the fun part of dining at a chinese dim sum restaurants. But this time, my folks are in town and they are total clean freaks. But we all love dim sum. :) Any suggestions?