I have bad circulation issues with my fingers and skiing has always been somewhat frustrating. I have tried many different mitts over the years, and have not had much success. Always had to use warmers, burning my palms while fingers froze.
I bought these mitts somewhat apprehensively. However, they were fantastic. They have Gore-Tex inner gloves that were great for driving, scraping snow etc, and they fit snugly inside the mitt. Inside the mitt, separated finger slots kept my hand in place. First day of trip, 10F in the morning with blizzard conditions. I stayed warm and toasty. Next day, clear and sunny with -4F in the morning and warming to 35F in the afternoon. I stayed warm and started sweating. No problems, just unzipped the fly on top for a little AC action.
Best investment I have made.