Techs are very knowledgeable and friendly. I've used WA on several occasions, and they were able to quickly diagnose and fix the issue.
Update Jan 15, 2019.... Had the service techs check our systems back in Oct. 2018, and was given a good report. We recently had a problem with our crawl space system, as the condensing unit was freezing over. After calling WA for service they quickly responded to check our system. However, two undiscovered leaks in the refrigerant line were detected and was 3lb low on refrigerant. We were told that the leaks are from the deterioration of the solider joints.
Though a costly repiar, WA continues to offer good customer service and great technical experience.