I'm using these felts to cover medical foam I've shaped for a custom keyboard wrist rest. The glue is incredibly strong, even on foam it's staying firmly in place the felt wears very well and still looks great after months constant daily use, so I have no worries that the felts will outlast the foams I installed them on.
The only thing I didn't like is the very strong glue/solvent smell when I installed it, considering that as a keyboard wrist rest cover the felt is about 12 inches from my nose. The smell was so bad I had to keep my wrist rest outside for two days for the solvent to dissipate, but I guess that's the price of the super sticky surface. After the smell disappeared, I couldn't be happier with the felt pads.