I reviewed prices from several different companies, did a bunch of research, and Advanced was the company I choose. Man I am not disappointed. Chris and Chris came in and were awesome in the description of what they were going to do and followed through everything, even hand washed each and every vent. They even replaced a flex line all the way in the corner of my attic that they saw was disconnected. I am so pleased I chose them and I will be telling all my neighbors and family members as well. A+ from start to finish.