The product is really well made, and screws into the standard 18-55mm kit lens on my Nikon D60. I've taken a few test shots and I'm very impressed with the quality - it's a great way to get into macro photography, very inexpensively.
What a great company too! 47th Street Photo, although based in the US, outdid a UK company on delivery! By at least 2 days (still not received the other product yet.) Plus the lens came with free gifts - a lens cleaning kit, some plastic covers for your D-SLR's screen, and a miniature tripod.
Now I'm off to go take some shots..