I'm thinking of cycling to work, its only 2.5 miles away, so i'm thinking it wouldn't ever take me longer than 25 minutes at a good pace. Could leave the car at home and save on car parking too as I could lock my bike up at work.
Don't think I'd cycle in winter though. I'd only do it in the Summer, the only thing that puts me off is the journey home after a day at work lol, dunno if I could be bothered the ride home! But that's just me being mega lazy, if I get into a routine i'd be able to do it no doubt!