I have my whole kit fitted with these heads and I'be been really impressed with the quality of both the build and the tone. The reduction in volume is really marked; I play mainly in a small church room and using Silent Stroke enables me to play without using dampening pads which destroy the true tone of the drums.
The mesh is really good quality and takes a good beating. Whilst I've only had these for a few weeks, I'd imagine they'll last a good while longer. The response from the head is really good too and really close to a normal head.
I'd definitely recommend Silent Stroke to anyone for whom volume is an issue whether practicing or playing live. One warning on live use though is that you may need to mic even in small venues as the volume is reduced considerably. These are supposed to work with triggers too though so you could potentially use an electronic kit solution with your acoustic kit if you wanted to have total control over your volume.