I've owned 4 of these blinders; two with the quad rounds, one with the X pattern and one with the skull pattern. They're well designed with conveniently integrated USB male connectors and are very bright. They look great too. Just be sure to use the correct fastening band, as I believe one of mine was too tight and it broke the nub on the plastic housing. The others have held up well.
I knew the blinder for the front, the blider rear bike light is as good as this one.
As I am a fancy man, I always ride with the little skull.
They're the best bike lights I've ever used. The brightness they offer keeps you as visible as a car on the road. You can play with different blinking modes to make sure you get noticed.
They help you feel safe at night!
The attachment clip on my Knog Blinder light snapped off. I emailed Knog and they had a replacement part in the post before l could say Boo! I'm a bit of a Knog nut and have about 6 of their lights. I love their products!
These lights are very good, one downside is that they're so easy to slip off they often get stolen from my bike