I have been to this location of Baskin Robbins a handful of times. It has decent ice cream but the toppings are not all that great. I would definitely stick with a cone of ice cream over a sundae because of that. That being said if you are tired of custard being the only frozen treat available just about everywhere else in town you will likely be happy to have stumbled upon this place.
When I have visited it was usually pretty busy and looked like cleaning the sitting area was not a big priority for the staff. You can imagine it is not very pleasant to sit at a table covered with sticky drips of ice cream and used napkins littering it, so take your cone and go outside.