I got a pair of these for my double pedal, mainly because I play a lot on electric and acoustic kits. Which meant I was switching the beaters out 3-4 a week (felt beaters don't really work on electric kits), which then meant my pedals felt different, basically every time I was playing drums.
Because these are made of rubber I won't have to change my beaters all the time. They also sound/feel great to play. Have used them for over 2 years now and they are just a little dirty, but no wear of the rubber. 10/10 , would recommend.