The problem I've had with coming in early is that most of the people I work around are procrastinators. So if the business day is 9 to 5, they will push off most of their work to close to 5. If I come in at 7am and expect to leave at 4 it is nearly impossible because that is the busiest time of most peoples days. It is a let down if I leave "early". I end up working 7 to 5 and then can't do my usual nighttime distraction-less work because I need to get up early the next day.
