I purchased the ADS Sub-Sat system in the early 1980's and they served in my main system for about a decade. They are my son's main system today and he loves them. I did have to replace the caps in the subwoofer amp a few years ago. Not bad after ~35 years of continued use.
Michael Kelly is a true gentleman and a great speaker designer. I had dinner with him once in Boston when I sold his Aerial speakers in my audio store. Needless to say, the Aerials are superb speakers as well.