Best battery life, best visibility, best selection of options, easiest to mount and take off, best price; what more can you ask for! This IS the best light!!!
Light has ample brightness and battery capacity for hobby cyclists. Various modes are helpful for seeing and being seen. Only complaint is that it tends to shift over bumpy terrain but needing to adjust it every so often is a minor inconvenience.
This a good light for getting noticed on the road. It has several flash rates. It's good for about 6 hours of flashing on a charge. I can't vouch for nighttime road visibility or battery life when on constantly. The rubber O-ring that holds it to your bike has no tab to aid installation and removal, so if you're taking it on and off frequently it's a little annoying.
I decided to add a front light for riding, not to see but to be seen. The Knog Plug front light is light, very bright, quick to mount and dismount, and has a micro USB port for recharging. Of course, it has a variety of modes - I use one of the flasher modes which is very effective and has the longest battery life (though I have yet to run out of juice even on multi-hour rides).
One minor reservation is the silicon loop used to secure the light. While it is quick and effective, the light can move a bit when going over rough pavement
Got this as a gift for my aunt and she loves it! Told me the light is pretty bright and is great when she is riding during the late evening hours! I also like how Knog comes with two bands one for thicker handlebars and another band for thinner handlebars. It fits a 25.4mm handlebar with no issue. I think it can even fit my 30.4 mm MTB handlebar too but haven't tried.
I enjoy using this light. It provides adequate and I can usually get 8-10 hours per charge.
I do have a complaint: I was riding in a cycling event. It was a damp morning to start out. I had to ride through a steady rain that last 45- 60 minutes. Even after trying to charge the light, the light would not work. I liked the light enough that I will try another one.
Easy peasy to use bike light. Love it!