Just bought me one of these. In covid lockdown, so I tried to find the cheapest, as I don't like overpriced products. Have had it for 3 months now and no issues. Feels very nice, sister has one (about $300) and they both feel amazing. But for the price of under $30, I think I scored myself a bargain as I am on the computer for work all the time. My back gets painful regularly, so I loosen it up with this amazing tool. Couldn't ask for more.