installation went as planned except that I expected the pipes from the loop field to come into the house underground, mine were brought above grade and then into the house. Lake Country (LC) said this was to avoid 'seepage' but I suspect its because they do mostly new construction where other contractors probably take care of sealing up pipe entries through foundation walls. From what I have read about geothermal it should have come into the house underground but opinions vary, including from GeoComfort (HP brand). IGSPHA will not give you advice and I have not read any IGSPHA manuals. Also, the duct work was not the same quality of craftsmanship as that from when the house was built (1957); but then again some duct work I had done this year by another contractor wasn't as good either. aI had to hire my own electrician because LC doesn't do 'high voltage' work (again new construction, other contractors do electrical work needed, LC strictly heating and cooling). That means if you have electric backup heat you need extra 240V(high voltage) wiring done; also for the heat pump itself. I do not blame LC for the electrical since it is mentioned in their proposal, its my problem I didn't think of the extra expense and inconvenience. The heat pump has been working since last summer, two cooling and one heating season. The HP has made a few strange noises, kind of a thud, at times where the compressor would start before the blower fan. Most times the fan starts before the compressor. When the tech came this summer for the annual maintenance recommended he said there was a loose wire he tightened. The system hasn't been running enough this year for me to notice if this fixed the anomaly. The reason I would not hire this contractor again is not because they didn't do good work but because I would want a contractor that did all the electrical themselves and who would definitely bring the loop field pipes into the house underground. Unfortunately it is hard to find a geothermal installer that did not branch out from HVAC that do the geo work as a filler to their normal business.