I had purchased a large mirror.  Once it arrived, it was larger and heavier than I thought.  No way I could hang this myself.  I was so glad I could purchase this service after the sale, customer service was great in advising me on how to order after the fact.  The gentleman who installed this mirror put it exactly where I wanted it, even measuring the wall to ensure it was in the middle, 2/3rd up from the floor.  He cleaned up after himself and made sure I was happy with the placement.  Will definitely use this service again.