I am so happy with this winter shoes. I had the Fizik R5 Artica ( not the GTX ) but it was heavy and rubbing against the crank arm. The GTX is suave! I used it 3x on 35-42ï¿½ and added a toe warmer, my toes were warm on my entire 40, 50 miler rides.
I've had a few winter shoes and this one rates very high on the list. Easy to get on and off with the BOA cinch and the finger hook on the back. Just right insulation and protection for chilly mornings and not too much when the weather warms up a bit. I have been using it with 40deg mornings turning to mid-50deg days. Fit was right on with my usual shoe size of 45.5. It felt as comfortable as my regular road shoes. The only downside is the velcro strap on the front of the ankle. When tight, I found it irritated my ankle during pedaling. Cuts into the ankle where it bends the most. So I just leave it loose and it feels fine. No loss of insulation with the nice high ankle cuff. Even better deal getting this on sale from BTD.
I rode over 2 hours and had no frozen feet when I finished my ride. high temperature was 45 degrees , little sun, the first real winter ride here in Colorado. The shoes are very comfortable and it was way less hassle then shoe covers. I wish i had had these in the mid 1980`s when all they had were the Sean Kelley`s Belgian booties. Quality product, worth the price if you are a year round rider like myself. Cheers, viva velo