I never seen that product before, but I have looked into HOB
I don't see the name of the skimmer and the price is pretty cheap, so the skimmer will most likely be of poor quality. It could be a really good refugium for a really small tank. You can do a lot better with other HOB
skimmers. It includes a pump right? Or do you have to pay extra for it?
Be sure to have an unclear wall between the fuge and main tank, or else you may start growing algae in your main tank.
Looks like a cheaper version of CPR's Aquafuge.