Gfuel as a drink is an amazing product. All the flavors (even the ones I'm not fond of) have the perfect amount of sweetness to them.
Now to the negative part.
Their shaker cups are absolute garbage. The first order I made was a starter pack, less than 1 week after getting it, and before I even went through the 7 test flavors that came with it, the lid to the shaker ripped almost completely off when opening it. After talking to several other people this is apparently a recurring issue with their shakers, and most of the people just deal with it because they buy the collectors pack every time a new flavor comes out so they have lots of them to replace broken lid. Gfuels response to me complaining about this was they would send me another shaker IF I paid shipping for it. Their shakers not worth the shipping, they are dollar store quality at best and should just be free with any order.
In final summary, Get a Blender Bottle shaker they are cheaper than the Gfuel shakers and MUCH higher quality, Then fill that bad boy up with GFUEL cause I cant find anything that tastes better or is as refreshing. That watermelon flavor straight up tastes like a liquid jolly rancher.