A story about a salesman that really impressed me a few months ago.
My Dad was looking to get a heat pump system installed for his house. I recommended he get a bid from the HVAC company I use for all my jobs. I call them to set up a appointment and usually deal direct with the owner, he is going to send his son out who handles all the retrofit jobs, etc. whom I have never met. When we meet he looks young possibly straight out of college and nicely dressed. I tell him what we need, this is a large house with 2 air handlers and would like to consolidate this to one air handler since one of the existing ones is in the crawl space. We go over the wants and needs and tell him about the existing construction, insulation and the upgrades to the home, foam board under new Hardi plank siding, etc. He then gets some coveralls on and goes under the house to check the ducts, etc. Then goes up in the attic the check return airs, etc. Then he goes around and measures all windows, walls, etc. Also measured all rooms inside and checked registers before the coveralls.
When he is done I figure he will be off to the office to figure the calcs and bid. But he says give he a half hour or so and he will have it all done. He drove a SUV and opened up the rear hatch and had a computer, printer, and racks of brochures, etc. in there. He does all this work out in the driveway standing under the hatch. When he comes in he has 3 bids with different options on heat pumps from basic to top of the line, all with options like air cleaners, etc. complete with brochures for each model and the options. Bids were complete and listed any power company, government, manufacturer rebates, credits, etc. He then very patiently goes over each bid and explains the differences, advantages, disadvantages, etc. Which models get which rebates and tax credits, or why not. He also explains in detail exactly what they are going to do with the ductwork, air handlers, return air, etc. and what they need from us if we do the wiring instead of their electrical sub, etc.
Overall very professional, knowledgeable, thorough, and you got to like the almost instant professional bid package with brochures.
My Dad didn't bite right then, he needed to get some other bids. He got his other bids, but in the end they got the job. Also the other guys took 2 to 4 days to get back with the bids.