Review (2/5): Wouldn't stick
I think this product would be amazing if you can get it to suction. I could not.
My bathtub is very old and refinished in a ceramic-type finisher. There is metal around the drain. However, no matter how hard I tried, I could not get this to suction, which basically made it useless. I also tried it in my kitchen sink, which is all metal. It would not suction there either, so I tried to use it upside down. Unfortunately, for kitchen sink use, the openings were too large to catch most of the debris I was trying to catch.
If you can get it to stick, I think you will like it. However, I suspect it will not do this for most buyers (and it's so cheap and small, it's annoying to have to go through the motions to return it). So, buyer beware.