I'm not doing a lot that I wouldn't be doing in an office - but I am dealing with a small number of people one to one instead of trying to get decisions by committee, and I also have the time and space to get on with projects without distractions.

I have occasionally worked on-site for half a day or a day, and I always find that whatever I'm trying to do takes at least twice as long.

I think offices work for campus-style collaborations, or for studios of various kinds. But considering the commuting, energy and building costs required to run an office, I'm not so convinced that they're excellent value for money for most people.