We had ours done recently and he did spend quite a bit of time looking around, measuring and asking questions. I was armed with info, I had a floor plan for him, info about improvements we had made and even some details on recent sales in the area (they will do this themselves but I wanted to emphasise the value we believed it to be).

All paid off as came in with a valuation almost $90k more than when we had initially valued 18 months prior!