Actually, when you factor in the Perrier Joulet, and the variety of high-quality food, it's a pretty good deal. Last time I went, there was a guy that had his plate loaded up with a half-dozen Maine lobsters - and they're full-size, not the dinky little ones elsewhere. King Crab legs, sushi, lamb, filet mignon, etc. You'd be hard-pressed to buy a similar dinner for that price.
And the waiters never let your champagne glass go dry.
I bought the groupon last night. It's an excellent deal, I highly recommend this brunch.