We have used Gwyndows Window Cleaning before and were pleased to see one member of the crew from the previous year. These guys take their time and do it right! The result is sparkling windows inside / out throughout the house. We have approximately 34 windows in a 2-Story house and they completed this task in about four hours with two people...very efficient! They are careful with your home; taking off their shoes on the inside of the house and making sure they leave no mess behind. We would highly recommend them for any application.