I’ve been buying knockoff brands for a couple of years for a little cheaper but they really don’t last very long. I could tell as soon as I put these ones into the pool that they were the genuine ones as they clicked in properly and they feel like they’re just going to last much longer. They were also a great price - much cheaper than some places, and not even double the price of the cheap brands. I’ve only had them in for a week or so, but I’m hoping to get at least a couple of years out of them. The cheap brands, I was lucky to get a year out of, so I’m glad I’ve gone back to buying genuine!