Gaufre is just off of the Grand Place. You can either eat inside, outside, or take your food to go by ordering at the stand. We went there for breakfast twice since they are cheap and have good food.
The first time we had crepes, mine with strawberry topping and hers with chocolate. Both were very large and delicious. The wait staff was very friendly and spoke good english.
The second breakfast, we had ham and cheese omlettes. These were not quite as good as the crepes, but still not too bad.
The prices were very reasonable. The crepes were three euro each, and the omlettes were 4,50. We also had one of their Belgian Waffles with chocolate one evening which was 1,50, pretty consistent with the other waffle stands around the Grand Place.