I've worked with many companies over the years, both as a contractor and a customer. Suffolk Systems worked on the inside portion of our geothermal installation in the last couple of years where the outside work was all new, but the inside work involved a retrofit from an oil based system to geothermal forced air and radiant. It's a big house, so it was a long job, involving 6 zones. That gave me a chance to get to really see how they worked. I will tell you that they scored high marks on all counts. First, they were technically adept in every way. In addition, they were careful and paid attention to detail. Also, they were really a pleasure to work with, as their attitude was always positive. I've worked with enough trades to tell you that it's a much better experience to work with professionals who have a good attitude toward their work and customers, vs those who are angry, don't like their bosses, or who would rather be somewhere else. And as others have stated, they were careful and respectful of the house/floors, wearing booties any time they walked through finished spaces. Mike and Lori in the office, and Dan on the job, all made for a very positive experience, and a great final product. I would not hesitate for a moment to recommend them for any job.