If you want something that will keep your hands warm while standing around in temperatures below 10 degrees, these are not what you're looking for. I'd recommend the Alti Mitts. What these gloves are great at is giving you a boost of heat when you feel your fingers starting to get cold, and you need more dexterity than mittens would provide. I've used these for ice climbing and cross country skiing in temperatures ranging from -12F to 30F. As others have mentioned, the low setting doesn't really do anything, so you need to be smart about when to use the heated feature of the gloves. For ice climbing, I only wear them when climbing and turned on high. The added heat allows for the use of "thinner" gloves in really cold (sub zero) temperatures, which gives you better dexterity and grip. When I'm done with the climb, I turn them off and put them inside my jacket to keep them warm and switch to my Alti Mitts, or warmer gloves. For cross country skiing or hiking, I start out with them on the high setting, and as I get going and warm up I turn them down or off. It's really all about battery management, and using them strategically to make sure the batteries last you the day. I'm giving them 4 starts because the battery life is relatively short and something that you constantly need to be thinking about. Also, OR hasn't had extra batteries available to purchase for quite a while now, which is an absolute must if you're going to be using these for more than a day. A couple of recommendations that would make using these more user friendly would be to make them USB rechargeable instead of the proprietary wall charger, and to include additional wall chargers when purchasing extra batteries (the charge time is so long, you can only charge one pair of batteries during an evening).
Ann Arbor, MI