For me, it's a Catch-22. I do tend to get more work done when working from home, because there are less distractions. But as a manager, many of those 'distractions' are people in and out of my office, so when I'm not there, much of that doesn't get dealt with, so it festers longer.
I have staff ask me all the time to work from home - problem is, history has shown me that most of the time when they're working from home, they're not accessible like they need to be for their job. They talk the talk, but when push comes to shove, people (including me) can't get a hold of them, so it's questionable as to how they're truly working.