Washington Energy Services representatives at the start of the process were polite and responsive. The representative that conducted the initial assessment forgot to turn our heating and fresh air return back on after completing his work. Unfortunately we didn't notice until the house got very cold over night. He was apologetic and offered to remove the charge for the assessment (which they would do anyway if we continued with them). They use a "good, better, best options" sales technique but were not pushy about it and allowed for coming up with our own combination of services. They were very responsive to all of our questions during this early part of the process. The installation was okay with some minor damage to the hatch and a couple of led light can installations not finished off perfectly. Unfortunately, their responsiveness became very poor after they received the complete payment. We contacted them for information about the led can lights and which dimmer switches would be compatible. It took them many weeks and repeat contact for them to get back to us. They have never been back to conduct the follow up blower test and not responding to our request to schedule it. We have repeatedly asked them to provide a detailed tax receipt that would allow us to claim some of the energy saving products on our tax return. We received a general receipt, without any breakdown of items, twice. We are still waiting for the detailed receipt. Their service after being paid has been so poor that I would not use them in future and do not recommend them to anyone else.