I bought both the highest models of their furnace and AC. The sales part was smooth, professional, and efficient, but when it came to their warranty, it was a complete different story.
Their warranty service was a nightmare! I was asked to pay for the service call even within the full part & labour warranty period. The tech insisted it's the company policy that I had to pay for the service call. The repairs took several rounds because the tech didn't do it properly and still didn't fix it. He exaggerated the problem and cost, and didn't honour the warranty. I was so fed up and found another contractor. It was actually a minor issue and fixed it with very minimal fee. The outside pipes they installed weren't well sealed, which caused rain to leak into the basement over years.