Before using this patch the rebound on my electronic kick drum (Roland KD-85) was a bit too much. I'm now using this with a felt beater and it feels closer to hitting a real kick drum.
If you buy this for e-drums keep in mind it DOES make your hits louder so if acoustic noise is a concern then this might not be the best idea for you.
If you want to test it make sure you keep the back cover before placing it on your mesh head (just tape it somehow for testing), since the adhesive material is really strong. If you stick this patch on a mesh head, you probably cannot remove it without damaging the head - not a big deal, just something to keep in mind. I'm perfectly happy with it myself!