The info on site says that they work well on recessed and flush yo-yos. I wouldn't use those on normal response because they are AS TWICE AS THICK as thick Dif-e-pads. 'Normal' yo-yos would get as responsive as the rubber-ball-attached-to-a-paddle-with-a-string-game. (What's it called?)
They are a bargain, though.
lol that game is called paddle ball. I remember playing with one when i was 7, i owned so bad, my string broke and i cried.
good times, good times...
But i don't know anything about pads sorry