The mushroom filet is a signature, and for good reason. It's so, so good. We went to Le Cellier in November and my friend got it, in an attempt to be different and just because I like to go against the grain I ordered the Coffe Rubbed steak.
What I ordered was also really great but very different, it was MUCH bigger than the filet and much thicker. The flavor was awesome, it really was, but tasting his I wish I had gotten the signature Mushroom Filet.
As for the dessert, they were both "just okay" I got some sort of cobbler and he got a chocolate mouse. The were fine, but nothing special.
Thats my two cents. maybe someone else has more info.