Not as warm as I hoped. Index finger is too tight, with the seam pushing slightly in between index and the middle finger. Thumb is ok, but could use more space too. Cuff is too short, and cold air can enter the gloves from there. The back of the hand has nice fleece lining, but not the palm.
Otherwise good for lower 30 to midhigh 20s, but not any better than PI Lobster mitts. I would extend the cuff coverage, and make it a lobster, that way fingers could keep each other warmer.
Ride consistently in 30 degree temps and these are perfect. Shifting and breaking is no problem and these solved my cold hands problem for good. Ordinary finger gloves could never keep my fingers warm no matter how much insulation they had. Something about having your own fingers next to each other made the difference for me.
I found that the sizing is a little small-order up a size. They work great, my hands are warm. But if your hands sweat and you take the gloves off, it is very hard to put them on again-the inner liner is sticky.
I wear the gloves to ride when it's too cold for regular four-finger gloves. They worked as I had hoped-kept my hands warm (even sweaty) when regular thermal gloves weren't sufficient.