Pros: Wide even beam without a hotspot in the middle to mess up your night vision, super lightweight battery, 2 hour listed run time, nice long cord, well sealed, feels bombproof
Cons: Not so easy to switch between helmet and bar mount
Recommendation: I LOVE this light. So this is a special make for Nashbar. They had them on sale and just after Thanksgiving they had a 20% off coupon. I got this puppy for 223 bucks (not including shipping or tax). Wait for another coupon and Get One Fast!
The optics on all the Light and Motion lights are top notch, this one is no exception. The beam is wide and has a smooth transition from the center bright area to the outer edges. It has no artifacts - just buttery smooth light and lots of it.
The Cub battery is compact and only weighs 197g. I actually get over 2 hours of run time. I have been on a couple rides over 2 hours and it has not gone into "limp home" mode.
I have settled on using the ARC as my helmet light and my Light and Motion Solo http://www.singletracks.com/mountain-bike/reviews/gear.php?gearID=1494 as my bar light - a great set up!
This would be the most perfect light ever if it was easier to switch from handlebar to head mode. As it is you need a Philips screwdriver.
It comes with the Turbo multi-chemistry charger too, charge time has been under 90 minutes.