This was the last part of the shower to be finished. Reason being, the tiler measured wrong, and the first piece of quartz came in to short. This would have caused an abnormally large grout line on one side...but I told him to take it back and remeasure.
It took another week and a half, but it was worth having it done correctly. He did do a great job on the tile that he installed, and overall we are happy with the end result!