We wandered into this one while looking for food on the way home from town. Staff were not unpleasant, but didn't seem too thrilled to see us. Service was slow (but the restaurant was quite busy). When the food finally arrived, most of it was cold. Cold goulash doesn't work for me.
The bill was very cheap, so I guess we got what we paid for, but I wouldn't go back. There are some excellent places to eat in Budapest, so don't bother with this one.