i use the MTB (cheap as hardtail) to commute to school. it's only 3km so the 20+kg beast doesnt wear me out. the bolt on wheels are good because when bikes get stolen (and it happens at least once a month at my school) they steal the quick release bikes first. sometimes take the front wheel, sometimes leave it. when i commute into the CBD (20km) I take the road bike, but I don't go that way often.