I use a full face for commuting as I don't fancy having road rash on the side of my face or getting my teeth knocked out! I use a Giro Remedy and have used it in 35C heat with no issue - except thinking that beads of sweat were bees!! I feel I lose a LITTLE peripheral vision, but not enough to concern me. This year I will be changing to a MET parachute helmet as it seems a bit more light-weight but still can provide some protection (will put some padding on the mouthpiece though!), yes people will laugh but I laugh at them stuck in their cars! I have had compliments too though from fellow cyclists. The weight can be a bit bothersome when you are in the drops and trying to look forward, also the size can be annoying when wearing a backpack. Overall though I am very happy with it and like I said, I will be going full face again.