The restaurant is located off of the Grand Place on one of the streets packed with restaurants. It has both inside and outside seating.
Both of us had the pot of mussels with fries. The portions were pretty generous with about 25-30 mussels per serving. The price was good at only 7,50 euro per plate and they threw in the first glass of wine free. Part of the reason that we chose this restaurant was because of the cheap mussels. We had never had them before and didn't want to spend 15-20 for a plate and then not like them. The other items on the menu were a little more expensive since we got the special.
The mussels were tender and the service was pretty good. There were only two other couples in the restaurant when we were there, but we ate really early that night, around 5:15 or so.
We would recommend that you walk down the street early in the afternoon to look at the menus and decide where you want to eat because if you go during dinner time, you will be forced to run the gauntlet of all of the people trying to get you to come into their restaurant.