First, let me just say that Hauser's after-sale support is absolutely excellent. They were responsive and eager to help correct any problems we encountered. The problem is not so much with Hauser Air's current staff but the salesman (Jim) who sold us the system and design. When we purchased our house, we knew the system was rather old. After one hot summer and one cold winter, we decided that we needed to completely upgrade it as the interior temperature fluctuation was unacceptable. We got bids from five different contractors for Trane and American Standard systems (both are basically the same products with different brands). Jim came in to our home and sounded very confident in the system that he wanted to sell to us, pointing to his decades of experiences dealing with houses in Southwest Ohio. The technicians sent to us by Hauser were all excellent. They were respectful and diligent in their working. They also did a great job cleaning up any debris. There were some glitches in the installation process that they handled well. However, after the installation, it became apparent that the system wasn't performing up to what Jim assured us. First, while temperature fluctuation inside the house became less, it was nowhere near what Jim had told us. Secondly, we revisited what Jim had told us on the day of his visit and what was actually installed and found a couple of discrepancies. He told us that we would get a second touchscreen thermostat control on the second floor but it was instead simply a temperature sensor. He also initially told us that the package included an Aprilaire humidifier with accurate humidity controls but instead we received an American Standard humidifier that is far less capable. Meanwhile, the zoning system also didn't initially function as intended and repeatedly caused the system to shut down due to air flow issues. Finally, Jim also mischaracterized the zoning system to us. On his sales visit, he told us that he'd zone the downstairs and upstairs when in fact the actual zoning system was more along the lines of downstairs vents being split 40/60, with the 40% downstairs vents grouped along with all supply vents upstairs. Lastly, the humidifier did not have a drain hose installed, splashing water all over my basement floor for several days before the technicians came out to fix it. With all that went wrong, why am I still willing to hire Hauser again in the future? Because their technicians are so nice and responsive. And the system, while nowhere near what Jim had promised us, is still much improved from the 21 year old Carrier system that it replaced. I've also heard some very good things about Hauser's owner, Roy, and his technicians made it clear to me that Roy treats his workers very well and is passionate about his business, and I really respect that. Despite Jim's over-promise and under-delivery, I'm willing to give Hauser the benefit of doubt on this very expensive and disappointing purchase. In hindsight, it's rather clear to me that Jim simply didn't understand the system that he was selling. In fact, on subsequent visits by Hauser's excellent technicians to fix the numerous mistakes made due to Jim's initial design, it became abundantly obvious that Jim simply didn't possess the technical knowledge of how this particular zoning system works before committing to a system. Although the technicians suggested some potential improvement to the design that should improve the overall comfort of the zoning system, it would also cost us even more than the $13,000+ we already sunk into everything. Quite frankly, the overall experience was sorely disappointing. Apparently, Jim no longer works for Hauser. I have no idea whether this is due to customer complaints or whatever. I just wish that I had gone with Thomas Watkins initially, since their salesperson's suggested system design is identical to what Hauser technicians later proposed. It could've spared me a whole lot of headache and hassle over the past year. The simple version of my review is: Hauser Air should be perfectly fine for most of your needs, but unfortunately my experience with them was through a salesperson who didn't understand the expensive products he was selling and over-promised/under-delivered during his brief tenure with Hauser. However, I would like to emphasize that Hauser's technicians and staff are exceptional and among the best I have ever had the pleasure of dealing with.