This rubber was amazingly precise on my bh when used with the stiga emerald vps penhold blade (as i am a penholder). But some problems when i flip my racket and use it on forehand. When start playing on mid to far distance it always direct the ball to the net. For me its good on flicking, agressive counter attack and bh drive. My opinion this rubber suits more for bh than fh. Spin is ok. Weight is far lighter that the non-FX version and its also controllable.
The Tenergy 25-FX is good rubber for player who is aggressive play with precision. This rubber has a good control but you can hitting the ball with very fast attack !!! The less point is durability, you can play with this rubber between 6 months to 1 year.
Very good rubber. Using it for my backhand since the poly ball came around, used Bryce Speed before, but it just wasn't spinny enough, so I went for the Tenergy 25-FX, and what a blow to my mind! It gave the same feel as a speed glued Bryce Speed, just faster and louder and spinnier. Amazing!