I have the demoncycle claw. Too small to be of much use but love the look. If you like the claw look but want to be able to see something behind, there are Arlen Ness mirrors with the same shape that are larger.
i have the kury scythe II. some have problems with the left mirror working it's way loose. mine did at first but a little loc-tite ( blue ) fixed right up. i have had no problems since. the mirrors extend straight outward enough
( don't follow handelbars ) for me to see clearly behind me and have enough clearence for hands with thick winter gloves
They retail for 40 a pop but didn't cost me anything. My father bought them for his suzuki M50 and hated them because he couldn't see a damn thing out of them. So he gave them to me to try. After a couple months of tedious adjusting I can see the lane behind me if I duck down and look from an angle.
I would have never purchased these mirrors myself because I do like to actually use my mirrors. but after installing them they look so good and go with the lines of the bike and look pretty bad ass. but that's about all they're good for.