Le Cirque: I went there once, many years ago (pre-Le Cirque 2000). Definitely overrated, and the dining room was so packed with tables that it had to have been a fire hazard. The woman at the next table brushed me with her hair every time she turned her head. (Granted, this was the era of big hair.) BTW, AchtungBaby, you'd better hurry up - my understanding is that it's closing at the end of this year.
Marche: I've been to the one in Boston a couple of times. The food is good, but I find it's overpriced for what you get.
Legal Sea Foods: Actually, I like their chowder. Other than that, it's overpriced for what you get, the service can be spotty, and I do NOT like how they redecorated the Kendall Square location.
Outback: Don't have a problem with it, except they're always jammed, so you have to either eat at the bar or wait a week or two for a table. An acquaintance of mine who was on Weight Watchers showed me a website that lists WW points for menu items from various chain restaurants... on the Outback page, the Bloomin' Onion wasn't even listed. Guess they had a little trouble with the "infinity" symbol.