One thing I've noticed about OpenTable is that usually when I can't make a reservation through their service (e.g. when it says there are no available times left) I can still call the restaurant and be accommodated. After doing this a few times now, it's made me wonder about the value-added for the restaurant-goer as well as for the restaurant. It seems like in these situations, OpenTable is just getting in the way of the restaurant-customer relationship to the detriment of both.