I recently got estimates from a half-dozen HVAC companies for the installation of a full ducted heat-pump system into an home that did not have it - a retrofit. Fort Collins Heating & Air Conditioning called me back within minutes of my submitting a quote request, and they came out the same morning - impressive. The guy who came out was dressed professionally and was notably friendly. However, his proposal was the only one that required two outdoor units and quite a bit of exterior hoses and wiring, which I had said I wanted to minimize. Pricing was also a problem; the estimate was, by far, the highest I received. I continued to like the estimator throughout the process, but the truth is that the quote was not competitive. This was the "Cadillac" of the companies I spoke to: the cost of a permit was included, they guarantee in writing that you'll pay only the estimated price, no matter what, and they have a final, separate quality inspection that nobody else does (or at least mentions). There's no doubt in my mind that these guys do a good job, and if that's all you care about, by all means give them a shot.