If you can use public transportation, you should definitely try it. I'm a student, but I also work part time in San Francisco; there is about a 30 minute commute. I am actually surprisingly productive while on the train working on my random side-projects. Having something to do stops the commute being a boring waste of time.

The one problem is crowding--if there are too many people, you might not get a seat or otherwise be uncomfortable. I avoid this problem by travelling at off-peak times, but this may not be an option. You should try it out and see how it goes.