Personable and Professional. Provided easy to understand details about how the assessment, diagnosis, and remedy recommendation process would work. Then did exactly what he said he'd do.
Friendly. Focused on doing the job right. Considered different installation options with pros and cons to enable me to make the best decision for locating the dehumidifier.
In hindsight; amazingly accurate. With the solution now in place, the result couldn't be better.
Fast and clean installation.
They left the place looking better than when they arrived.