I have a heat pump that was so noisy that I had trouble sleeping when it was on. Two different techs (from big companies) had looked at it and could not diagnose the problem other than to recommend an entire new unit. I had not heard of Niehaus when I ran across them in an online search and saw that they consisted of just 2 experienced techs and had great reviews so I set up an appointment (which to my amazement was for the next day). Lance came out and diagnosed and solved the problem for me. He was polite and efficient and obviously very knowledgeable. The service charge was extremely reasonable for the time he spent working on my heat pump. With this company you will only ever get Lance or Scott (not the revolving cast you get with the big companies). I highly recommend them. By the way, do not be confused by the company name here — this one and the other listing online with the “USA” is the same company.