I bought these a few weeks ago and haven't put on another pair of gloves or mitts since. My pointer finger does get cold sometimes, but that's in water about 40F and during the winter.
These gloves are the first to keep my hands warm. I’m a thin dude with skinny fingers so opted for these instead of the gloves. Surfing in Virginia for water temp reference. I definitely was an XL, fit perfect, I’m 6’4”.