nope haven't tried or even heard of them before I googled, but they look strikingly similar to some i got from China a while ago off ebay. I only paid 99c for mine though. They do a reasonable job. If they only come with one microfibre insert thought they won't be terribly absorbent at all (that wouldn't even hold one of DS' wees). My Chinese ones only came with one so I just use some of my old boosters as well as the microfibre insert and they're fine. Bit of wing droop but I have the skinniest kid (he's still on the 6month setting).