i've been to ten mercer twice, and both times i came away with the same feeling -- eh. the food is ok, nothing special. the appetizers are ok, and only one app (the cheese simosas) are better than average. the service is weird - we had a waitress who was great, but the lady who brought us our meals looked like she'd just gotten in a fight w/her boyfriend - very angry look on her face, very bitchy attitude. she plopped the meals in front of us without trying to figure out who they belonged to, and my vegetarian hubby was not too excited to look down at a plate full of pork.
the pork was undercooked and only warm. the side that came with it was lacking taste.
they make a really good drink there, so if you want to have a fun bar night then it's a good place to go. but unless they make some major changes in their chef/menu, i wouldn't go back.