My cats love it!
My two cats love it. The smaller 4.5kg one doesn't budge it, but the larger 6.5kg one pulls it a bit, so I wouldn't recommend a slippery floor. We have ours on carpet.
Bought in December to prevent them scratching the carpets, and it has worked but they use it so much the cord has all unravelled so now I need to buy a new one. Would love a cord refill pack! More environmentally friendly that way than replacing the whole thing.