We had our ducts cleaned the end of September by Desomd with Covent. I have had this service many times by other companies so know what to expect. Firstly, Desmond showed up with a shop vac with an extension nozzle ~ have NEVER had them done with a shop vac. Secondly, his phone rang constantly and he spoke with each of his callers. Thirdly, by the time he was finally done he requested the check be made out to him which I did wonder about but just wanted him to be on his way!
As a result, I am not real sure how effective his services were because we have a shop vac and could have done the same thing! Live and learn, that's my motto and I'm sticking to it!