I've had that stuff. It's not bad. I prefer other types of drinks from Japan though. CC Lemon is good. Cider wise... it's not really Japanese... but Apple Sidra is good.
I usually get Pocari Sweat or Aquarius.
Ah yeah, Pocari Sweat is really good now. I'm happy yet a little annoyed it was changed from the original flavor.
For those who don't know, the original flavor ACTUALLY tasted like sweat.