I only got gfuel recently, getting myself two tubs and a starter kit. So I wanted to throw in my two cents of someone who recently switched to gfuel from (4-7 cups of) coffee or (1-2) monster a day.

General stuff:

Because it is a powder it doesn't all dissolve. If that bothers you a lot, this might not be for you. Personally I don't mind giving it a quick shake if I've left it for a bit.

The energy I get from this feels a lot better than monster and coffee. The feeling I get from it is a more focused energy than coffee. But I don't feel quite so jittery as when I drink a monster.

The fact that it's a powder is great cause it allows you to make whatever you'd like. Whether you want a milk, water or soda drink. Some flavours work better than others in each medium and by preference.

Flavours:

Rainbow sherbet - This is top 3 right now. Kinda orangey with a really subtle cream taste at the end. Great in water and I imagine it would be good in milk. This was one of the tubs I got. 8.5/10

Moonpie - I swear I've tasted something like it before, just can't remember what. The first time I took a sip I was taken off guard. But i really like this as my morning flavour in milk. It tastes kinda like a peanut butter and Nutella shake with a graham cracker finish. It is slightly salty and maybe a bit caramelly. 7/10 (Bet this would be amazing in hot chocolate)

Bahama mama - this is another top 3. Heavy on the coconut with a tropical (mostly pineapple) base flavour. If you like pina coladas you'll really enjoy this. If it wasn't an energy drink, this would make an excellent mixer. 8.5/10

Pewdiepie - this is the last of my top 3. It's lingonberry. Imagine cranberry juice with no bitter after taste. Or like the soda from ikea. This is just a good flavour. This probably won't always be in my top 3 but it is a strong flavour. 8/10

Tropical rain - very similar to Bahama mama. Very similar to those tropical Mike'n'ikes. This is a really good flavour you can't go wrong with. I can definitely see this being a big favorite of people. 7.5/10

Snowcone - I don't have a lot to say about this. To me this is a decent flavour but it's mostly just sweet. I don't find any real depth to this. I mean it tastes like the snowcone flavour syrup you get at winter fairs. 6/10

Might try making gummy bears outta some of these flavours.