That's a fair question. My vacuum is a relatively cheap one, maybe $150. If you can see the .PNG file I posted with my reply yesterday, it shows the lines the vacuum took in vacuuming the chapel. First it divided the chapel into sections, then it went in straight lines. When it hit one of the Pew legs, it worked it worked its way around the leg, and then resumed on the line that it had been taking. It ended up doing a very thorough job. I'm skeptical the church will ever want to do this, but there's nothing about the technology that prevents it. The robot vacuum did a very good job in the chapel. In fact, it did a far better job and got in far more spaces than humans do with the vacuums we use. The classrooms would be harder, because the fire code requires the doors to be closed, at least in my state. But for the chapel and the hallways, it seems like it would be a great solution.