By car it takes me 20 to 25 min door to door when there is no traffic, normally 30 min. By bike, I am around 50 min to 1 hr including shower getting to work.
Going back home at rush hour will take me at least 5 min only to get out of the garage building by car and on a bad traffic day it could take up to 1 hr to get home depending on the time you are leaving.
Once took me like 15 min to get to the road from the underground garage....
My route is 80% trail, 15% road with bike lane and only close to the office I mix with vehicles on the traffic for 4 blocks, so pretty safe all along.
Not a rainy day rider, but I got used to cold (lower I went is 24 F) and having a good second year commuting experience.
For me, it is a good way to get some exercise and 'free' time, enjoy the nice views along the ride and of course avoid being inside car in the traffic.