Such a cool idea! I had medium Salted Caramel ice cream with nutella and rasberries mashed in, best combo ever. Went on a sort of busy day and we joined the 6ish people long line on the left. It was a little bit annoying seeing people walk up to the counter and basically cutting in line while we were being served, and there were many grumbles from those waiting in line. Servers were busy trying to serve but didn't try to sort it out, but it would be lovely if there was a clearer line. Overall it was a decent price for the novelty if you get two add ins to be smoshed in, and was quite a quick process from lining up to having the ice cream in hand (apart from the line cutters). Be prepared for a line, it'll give you time to pick your creation!