I use them. They are perfectly sized to my knee, and I never even notice them on my legs. They are by far the best purchase I have made in the MX world padding wise. The shin guard goes perfectly inside of my boot, and actually makes the boot feel better (more snug (not tight though), and the shin padding is more comfortable than the boot padding). I have yet to smash them into something hard, but I have him them very hard with a hammer with no pain. They are very very comforatble, and I will buy them again if I ever need to. I hope that they make elbow pads with the same engineering....I would buy them in a second.
No, I don't work for them, I just like to give credit where credit is due. If you can afford them and need a pair, these are a no brainer.