Dissenting opinion here, but I think it's an overrated and overpriced juice. Not nearly worth the ~20$/30mL.
Tastes like "Fruit Circles" or any other Fruit Loop-esque flavoring. Like, seriously. Try some Fruit Circles by Flavor West with a little bit of some citrus-type flavoring in it. Pretty much identical to Looper, although I'm sure someone has the recipe pegged a little bit better.