I was at the OR show and tried it. It tasted pretty good, my favorite flavor was the original flavor. I can't vouch for how it works during/after activity. It has a nice light taste and isn't too sweet.
Another brand I have tried is Achiva Energy (http://www.achivaenergy.com/), it has coconut water, chia seeds, and chai tea in it. The chia seeds make it less of a beverage and more of a snack, but we really liked it.