Well, let's just say, despite the odd broken hand and gravel rash, written off bike, it's been a positive experience for me - been riding for 22 years with a fair bit of that cycle commuting, and gaps in between.
Been back riding every day, all weathers, (except heavy ice/snow - which accounted for about 3 days) in the last year) and it's far quicker than most other forms of transport.
Put some thought into your kit (clothing, bike, accessories), what to keep at work etc, and there is good exercise thrown in without having to use 'free time'.
Expect more close calls in city centres - goes without saying really.