Got a couple of other bids and David came in lower not by bunch but enough- on top of that, very clear about what we needed and what we were buying. Not only that but when I mentioned I was headed out of town two days later he juggled the schedule and was able to install the next day- the crew was courteous to my wife and installed quickly and cleanly- the whole experience was as much a pleasure as getting a new system can be. David has a lot of energy and is thorough and polite.