Grayson & friends came to my apartment well prepared. Though they were friendly, they were VERY professional. They worked as a team, & answered any questions. They also were very cautious in caring for my furnishings. I was particularly impressed, because Grayson is a very young man, but very mature in his business dealings, totally in control of the operation, often teaching the young men he employs. I highly recommend GKS WINDOW CLEANING!