I've been using the Bontrager Ion 800r for about 8 years. Absolutely fantastic lite and well worth the purchase. The rechargeable battery is finally starting to show it's age a little as the charges are not lasting as long, but I still get a decent amount of time out of it. If I use it just as a daytime bright flash, I easily get 15 to 17 hours out of it which for an 8 year old lite, that is still pretty good. It is hella bright and whether I am using it during my daylight rides or at night, I can see and be seen. I have gotten my money's worth that is for sure. I just picked up the Bontrager
Ion 700r Comp on sale for $73.
I also use the Bontrager Flare R rear light as well.
Worth a look.