I was given the pleasure of trying the new Gatorade hydration booster (Tropical Mango flavor) for free when they sent me a sample to try. And I will have to say it was not as bad as I was expecting. I struggle to stay hydrated and to drink water. But this wasn't terrible.
Flavor wise: I do think the flavor was a bit tart and lacking in the mango department, but over all it was still very refreshing without being overly sweet or tangy, it mixed very well, and did not have an after taste.
Over all its easy to throw some packets in your bag and keep on hand for when you're feeling sluggish and dehydrated.