I had the blowhole flavor and it was good. 9/11 highly recommend.
A great sampling to see the quality of powder you'll soon be buying in bulk. Flavors are developed enough to contest mainstream energy drinks, but not so strong to make it seem like you're drinking syrup flavored spirulina.
For being a customer from outside of the states the delivery was great. Also the product itself has been great to me, I get energy and a nice flavoured drink.