I went to this Bier Markt the first time on the recommendation of a friend who saw an ad for Belgian National Day celebration. Free beer on arrival (who can argue with free beer) and lots of free hors d'oeuvres going around were really nice on a small outdoor patio on a summer afternoon. The surroundings left something to be desired however: a quiet street without much traffic but a few cars parked, a graffitied wall, and the sound of some really lousy and definitely not Belgian live music.
Food here is touch and go; they really do try to provide a nice variety of gastropub-like options with a Belgian twist on a number of them but the execution isn't always 100%. I'm not a moules-frites guy so can't say much on the state of those. Items on special menus have been consistently good.
The variety of beer, however, is top notch. I hadn't yet found Delirium Tremens on draft anywhere since, well, Delirium in Brussels. The beer menu is helpful and extensive. And while I wouldn't go too nuts on some of the options offered, most look too good to be true and I'd trust Bier Markt to know what they're doing. Prices are a bit on the heavy side given a number of these can be found for quite a bit less.