On-time, professional, knowledgeable and polite technicians. However, installation techs recommended duct work to better utilize the variable speeds and multi-stage compressor. This was not discussed during estimate. Requested a supervisor/manager to discuss this on-site, and issue was negotiated and resolved within couple hours. Negotiated a fair/good price for additional work. All work completed in a timely manner. Very satisfied with product, installation and performance. Somewhat dismayed by estimation without ductwork, but resolution was satisfactory to us. Beyer is a solid company.