I bought a pair of these at the Madison bike swap this past weekend, and I've used them the past couple of days for my commute. Short version--they're GREAT.
I usually need the thickest, warmest gloves and mittens to keep from freezing my fingers on my 8.5 mile commute. I've been using a pair of REI double layer thingies--gloves on the inside, with a mitten shell. Even with that, I often need a chemical warmer when it is subzero, or near zero.
With the Bar Mitts, I can take the entire outer mitten shell off, and I'm completely comfy with just the lightweight inner glove. And it was COLD this morning, 0 deg F with a substantial wind. I got the Large size of Bar Mitts, and after just a mile or so, the body heat from my hands and forearms makes it good and toasty inside the neoprene.
No connection at all with the company, just happy that I have warm hands for my ride!