I commuted for years on my Bike Friday folding bike although I never used the folding feature for the commute. It just happened to be the bike that had the necessary bags and fenders on it so it was more convenient to use it instead of one of the 'regular' bikes. I've also used it for some loaded tours and century rides and find it rides almost the same as my 700c bikes - but it does go through tires quite a bit faster.