Yep- I am still getting amazing results with respect to water clarity and how nasty my skimmate seems to be versus no ozone.
In terms of safety I still have no ozone smell from skimmer cup at all- so the dosing levels are really low- I am again surprised how effective it has been.
I have simplified my setup with the addition of this, as I have no removed my UV from my chiller loop as well, as I felt it was likely redundant (and wanted a bit more flow).
setup could not be simpler- just connect the air tubing to your skimmer inlet tubing...
I am currently setting up a 800l tank- will definitely add one of these to the sump skimmer..