This is an all round superbly designed and sturdy product, all the lumens you need and great visibility from the rear and side. The charge lasts for ages. Essential for rider visibility when winter riding in the dark but it also works well in daytime conditions too. Attaches easily to the seatpost. My only minor gripe is that out of the box it can be a tad difficult to detach the light from the part that attaches to the bike frame, which you need to do to access the USB charger. This does get easier over time with repeated use and technique though. The included USB extender cable is really useful when charging using a laptop/ PC.
Some lights just make it hard to see anything and they annoy people - this one is super bright but not "in your face" bright. Love the size and the unmistakable alert it gives out.
Big Cobber Rear Bike Light by Knog is the very best bike light out there
Light seems very good from early use. I would agree with one review I saw, and it stop me from giving 5 stars. It is too hard to attach the light to it’s mount when the mount is on the seat tube, so you end up having to take the mount off the bike to slide the light on the mount, then you have to put the mounted light back on the bike. And, having to do so, I question how will the skimpy silicon straps that hold the mount to the seat post will last. All in all, light seems great, but the mount could use some big improvements.