I ordered the wide angle (not telephoto unit, the Adorama review picked the telephoto one for some reason). I wanted to convert my little Aiptek HD camcorder to a wide angle. This little converter worked great and was suprisingly hard to find. I saw some good reviews of Adorama and decided to try them and sure enough they had the wide angle uint I needed.
This is a great add on for a point & shoot digital or small digital video camera. It adds so much to a camera with a limited wide angle like the Sanyo HD700.
My main issue with this lens, is the perk / benefit as well.. It is great to have a magnetic mount to hold the lens onto a camera with no screw threads... but you can bump the lens out of position, and will have to check it before each shot if you handle the camera alot. Also if you are traveling and shooting video, then you need to take the lens off and put it someplace safe between shots, or you spend a fair amount of time cleaning off pocket lint / fingersmudges.
All in all a great product with some limited usage. Would love to use it when traveling, but as I hike a lot, I am afraid of knocking it off the camera and breaking it, even at its low cost...