Well I tried boosting this rubber and doing more testing, and I still find it really disappointing. With some light boosting, the speed seems to increase a bit. In some ways the rubber is actually quite fast, but it still has issues.
First off, the rubber is listed at 49, but actually it is extremely soft. I think it is more like 38-30 hardness. I don't know how in the world they can list the rubber at 49, but actually this is a very soft rubber. I tried it on the forehand, but it really is very soft. So I think that it didn't really fit my FH well. I'm used to hard Chinese rubbers on FH.
So I tried it on BH. It is quite fast and quite snappy, but that's not the problem. The throw angle is very low, so with my normal backhand stroke, the balls tend to skim the net. Especially when you try to drive through the ball on the backhand, the ball tends to go into the net. This issue is less pronounced when looping. But during a game, its constantly on my mind that the BH side shoots at a lower angle.
Also when blocking, I feel that the rubber is too soft and mushy to block well. I feel like I'm never sure where the ball is going to fly when I block. It might go down into the net, or it might fly long. I think a good blocking rubber should be a little harder and more stable.
Finally, the rubber does not feel stable and firm, it feels soft and elastic. The short push game is really wild. It's very difficult to keep pushes low and short.