When I was required in the office, I would just wear headphones to avoid distractions, but I would have to deal with 2-3hrs of driving/day on top of it. This meant that my employer generally only got those 8hrs out of me, period; because I had none of my personal time to spare. Working from home, on the other hand, gives me more flexibility for meetings, to work at different hours, to be on later in the evening, to put in more time (when needed), etc; and I'm happier.