If you are looking to add that extra attack and "clickiness" to your kick I am yet to try a pad that does a better job than this one! Definitely suitable for anything rock related or any context where more attack and higher frequencies are needed from the Bass Drum.
I even put them on a practice kit at home (with foam stuck to the beater head to reduce volume) and I was surprised how it transforms the sound. From basically only lowend to a clicky punch. It did lose some of the low end and the overall volume inceased at bit. You could probably put this on any (kick) practice surface and get a more definied sound out of it.
Aside from the sound it protects the head as it should and I haven't managed to break one.
PS: The glue is quite strong so be careful to put it in the right position on 1st try ;)