Was curious how good a $5 rubber could be. Got the 2.2mm version for slightly faster speed. Glued on my spare Avalox BT550 blade and was pleasantly surprised. Easily bottoms out to wood on strong loops and light smashes, but I like it this way. It has a definitive offensive CRRAACCCK sound when bottoming out. Did I mention this is really light? For Chinese-style brush stroke players, this rubber works just fine for stroke development. Might be a bit slow for some, but what you lose in speed you gain in control.