This rubber is not terrible, but its definitely a notch below the new generation of Tensor rubbers from Germany i.e., Xiom Sigma, Donic Bluefire, etc. as well as the Tenergy and Calibra rubbers from Japan.
Its a very mild-mannered, predictable rubber with a medium-soft sponge and a surprisingly soft topsheet. Not too spinny or fast, but not too reactive to spin.
Its like Butterfly Bryce, but with better feeling for the post-glue era. I use it on my backhand - only complaint is that Butterfly has a set a high price for this rubber here in the U.S.