I like the idea of them better than the Pearl Izumi lobster gloves because they have a removable liner. I'm a little unsure about the 70 dollar price tag though, but I guess if they work then they're worth it.
For reference I will be commuting about 5-8 miles a day, 7 days a week, in temps from 5 F-35F with snow, slush, and ice. Or at least I plan on it.
In general, removable and replaceable liners are always nice. Those liners are also nice because eventually the insulation gets packed down, loses it's loft and therefore it's insulation power. As far at $70 for quality gloves, it isn't too steep, i would look at the quality of stitching, where the stitching is, if they're waterproof is the stitching taped properly. etc.