There were many enhanced water products I've tried, mostly SoBe LifeWater & Glaceau VitaminWater products.
The first Vitaminwater flavor I tried was Power-C (Dragonfruit). It tasted horrible and had a bad aftertaste. Essential (Orange-Orange) was average. XXX (Acai-Blueberry Pomegranate) was pretty good. To me, XXX was one of the best flavors of Vitaminwater I've tried.
The two I have recently tried are two AriZona Rescue Water. The first one I tried was the Relax flavor. It was average. It didn't taste anything special. The other flavor was called Immunity. That one tasted better.
The best thing I could get from these is if they live up to their claim. I'll talk about the other flavors of Vitaminwater I've tried later.