I have the original other brand version of this also and they both do exactly what they're designed to do. The science is there.
This version is a well made foldable stool. It's very sturdy. It has silicone feet so it stays in place where you need it. It has a low profile so it's never in the way or bothersome.
It has a hole in the center that is unexplained at least not to me. The description mentions a spice box which is a possible explanation but there is no other mention of what that is by seller or reviewers.
However as curious as that is it doesn't affect the good quality. It works and looks fine despite those little mysterious quirks.The stool is 7" inches high and works just as it should.
It's a healthy plus to any bathroom and if less than the original 'other' version, this is a good alternative. I like both versions. I think the one year warranty is a plus also.