Hey I thought this cube was amazing out of the box, and it was, but now i have had it for almost two months and well it locks up like nobody's business. I've tried almost every tension I could, but it was either too tight, or too loose and locks up. I now average around 25 seconds and I can't keep consistent times. But i would recommmed if you're around 30 to 40 seconds. I will buy a QiYi Thunderclap and that is way better than this.