It's a gimmick, it's fun, I'm glad I tried it. But will I be going back? That's doubtful.
On the plus side, the service is excellent and the staff go out of their way to customize your purchase. The line moves fairly quickly and the staff are enthusiastic and helpful.
On the negative side, I'm not really sure if rolled ice cream is "my thing." I'm open to trying something new, but I'm not sure how rolling the ice cream makes it any better.
I'm not discouraging you from trying it, because I enjoyed going there. I'm just not sold on it.