No experience whatever, but the fact of the system not having replaced
anti-fouling paint caused me to smell mouse milk. I went looking for where they would hedge their bets on actually doing the job with sound waves. I found it in this quote from their website:
" an aging [bottom]
paint will continue to naturally erode and leach what little toxins are left and when used in conjunction with the Ultra System, this makes a significant difference in preventing growth to your
hull."