Not everyone is the same or does the work the same way. I know it's hard to understand. You would think like changing the oil in your vehicle, that is done more or less the same way by any mechanic you take it too.
However, hardwood floor and stairs installation, and especially refinishing is more like an art rather than a straightforward task.
Think twice who you are going to let to touch your floor. My reviews are posted by real people on my Google+ page.