Gatorade Zero packets are convenient to keep in my bag in case I need it while I'm out. They mix easily into a bottle of water. The only thing I don't care for is the flavor of this one. Lemon-lime isn't the best Gatorade flavor in general and it leaves a sort of chemical aftertaste because of the artificial sweetener.
I wouldn't pick this as my first choice- I would only drink it if I was dehydrated and it was the only option.