DO IT FOR THE GRAM.
CoolN2 is a great experience and something cool to try at least once. The menu is pretty limited, but definitely go for a popice if you're unsure. I recommend the mango one which was topped with fresh sweet mangos. The strawberry one was okay at first, but halfway through it tasted too artificial for my liking. The bottom of the popice also has a layer of pudding that totally threw me off, but my friend enjoyed it.
The biggest drawback is that it is too damn cold. I know it's made with liquid nitrogen, but after finishing half of my popice, my tongue was numb from the cold - kind of like I burnt my tongue.
It was still a nice experience though, so check it out if you're in the area!