Quickness of response. Quality of explanations. recommendations by local folks. Fair estimate for work. Guarantee. NOTE: The only reason I put a 5 in the recommendation section is that no time has passed since installation was completed so I have not yet had any experience with the way the roof handles poor weather. I do not anticipate a problem, and if there is none, I would fully recommend Klaus and Smegal to friends. But at this point only a day has passed. Give it a month or two of smooth sailing and I'd up the 5 to a 10.