this is a very family friendly burger place, and the food is very good as well. It's conveniently located steps away from the San Mateo CalTrain station, so we often take the train from Menlo Park to San Mateo and have dinner here, then head home and hour or so later. Service is very quick.
the line to order your food sometimes snakes out to the front door, which is also where the soda fountain is, so you get a lot of people crossing in front of each other, and there is usually a large crowd. The restroom leaves a lot to be desired, as it is in the middle of the kitchen, and is small, so if you have kids, it's a little cramped.