My problem was cold-weather M/C gloves not quite working up to snuff... I have heated grips and they help, but my fingertips still get frigid once sweat builds up.  Adding these glove liners to the routine changes everything.  Heat from my palms distributes out easily and my fingers are toasty warm in those ~35F commutes.

They get snagged on velcro as others have said, but that's the nature of the material.  I have a habitual routine to deal with this--put on one glove liner + glove at a time so it's never exposed to the velcro.