I have moderate Raynauds, which makes winter riding difficult. I've tried all the tips for people like me, and finally ordered these boots two winters ago. They help for temps in the low 40sF, but below that, or even for long rides in low 40s, my toes still become painful and white (going through all the colors with rewarming...). At very low temps, I add battery powered heated socks. The battery packs are annoying, but so is not riding :-)
I will say that the boots are quite comfortable and have held up well.
I'll also add that Pearl Izumi's lobster gloves are the best that I've found for my Raynauds fingers. A little awkward with Di2, but they do work.
I wish I had sprung for these sooner. They are warm and much nicer than my summer shoes with a cover. I did get the wide version thinking I would need that with a heaver sock--I normally wear the normal shoe, i.e., not wide--but I could have gotten away with the nonwide version. I recommend them if you ride in 30 or 40 degree temps.
