It's very similar to the esplanade location, but much smaller. Basically, a good selection of beer, nice tasty food if a little on the expensive side. They often have some free sampling beers and mussels on weeknights, which helps. Service tends to be good, but a little slow. The atmosphere is nice enough, and having a patio helps if the weather's good.
Parking at Shops by Don Mills is always a bit of a pain -- you won't be able to get near the place, so you have a walk ahead of you. Assuming you can live with that, the Bier Markt is a nice place for a couple of good beers and a somewhat pricey bite to eat.