The problem with clipless is that you've got to invest some time and money to figure out whether they really make a difference for you or not. If you're thinking about getting them I guess the question to ask is what is it that you expect they'll do for you?

If your commute is flat, under 10 miles and/or involves a lot of intersections, you're not going to get to work much if any faster with clipless. I still wear them on my commute because I've grown accustomed to having my feet attached to the pedals but the real benefits come on other types of riding.