Dependable bright light. Holds charge well
Nice basic taillight. Good for traveling. I have a Garmin Varia, but I also attached one to my seat bag and one to one of my helmets, so I am lit up like a xmas tree. You can't have too many lights.
Charge last a little over 4 hours. I keep one for backup on long rides. I find it hard to turn off, but that could be me.
Simple, bright, priced to buy one for each of of my bikes
Easy to use, very bright, holds a charge well.