I used to love taking the train to Narita. I hated being tied to the bus schedule-although when I first met the S.O., I would stay at her apartment over in Chiba and then catch the bus the next day when I had to make a business trip. It only took 25 minutes instead of the usual 2.0 hours.
Now there is a New Narita Express!
If you are really in a hurry-there is another option.