I've used Tenergy 80 with both my Timo Boll ALC (which broke!!) and now currently using it with my Carbonado 190.
The rubber offeres a great amount of contol while blocking and spinny loops. I've only used it on my backhand, and I prefer it to Tenergy 05 when it comes to opening and blocking, but nothing else.
Theres just something about this rubber that I don't like, but I'm not quite sure what it is. I'm a player that relies on hi-speed shots combined with a lot of spin, and Tenergy 80 just doesn't provide me with what I want.
If you're a player that needs control and spin, this is a great rubber for you. It's also great for the allround player that needs a mixture of control, speed and spin. If you're like me, and relies on fast, direct shots, you'll be dissapointed.
For me, Tenergy 05 is perfect for both forehand and backhand, as it's better for fast counterhits and powerful loops.