Switched from oil to natural gas (already piped in the 1400 sq ft home). Bill - salesman - was great and very down to earth and knowledgeable. Leslie - his financial person - was friendly and provided helpful information in a timely manner. Actual install took 3 days with trouble finding some parts (I was told). Actual installers did not give me lots of confidence. Communication after the install has been difficult and spotty at best. It's been almost 2 months and the work still has not been inspected by the local inspector. The issue with these big companies is that it's difficult to figure out who is who and who to call for what. There is the ubiquitous 1-800 number you call and press 1 or 2 or 3 or ........ Hopefully in the end it will all work out. But it seems to have been not the smoothest process.