I've only been here once, but it was a memorable experience. I actually went there last late fall, so the line up wasn't as long as it is now (I always see huuuuuge lines every time I pass by here - which makes sense, because I've recommended this place to many of my friends to try out and I'm sure a lot of people are doing the same). The ice cream here is delicious. And huge. The portion is HUGE. It's really good for 2 people. Unless you're really keen on getting different flavours or getting that instagram pic, I think getting 1 cone/cup is enough for 2.
Perhaps I'll go back there in the fall again, because I'm the kind of person who weighs the line up as a variable in my purchase, so the long lines are really discouraging; however, if you're in a group and want to go for the experience, I would definitely recommend.