Yes, I have tried them, and maybe I'm in the minority here, but they taste AWFUL. I know this is TMI, but to me they taste like burped-up stomach acid. I was hoping that they'd taste like Crystal Light, but not even close. The only problem is that I get sleeved tomorrow and will have to do Clear liquids for a week. Isopure is one of the few liquids I'm permitted to have, so I'm going to choke them down anyway. I hope they don't go to waste!
Don't let my experience deter you from trying them--you may end up liking the taste. If you have a Vitamin Shoppe near you, you can find individual bottles in their refrigerator case so you can just try one and see how you like it. I think they're about $3.99 or so. Good luck!