I have never used it, but did a bunch of research on it, as I was going to. I run 100% Zeovit, so ozone isn't compatible, nor is needed on a Nutrient Low System.
With todays setups, ozone is pretty safe, if you purchase all the equipment and meters, things can be self regulating without pumping too much ozone into your tank or surrounding atmosphere for you and the family to breathe (Remember ozone isn't good for you either). However these problems are not as critical nowadays, as long as you run the proper gear (regulator, ORP meter, etc)
Personally if you are having nutrient, algae or any other type of nuasance issue, I would research more to what the cause is (overstocking, overfeeding, water changes, etc.) and then fixing these issues. Then once your system is stable, if you want to fine tune things (make the water clearer) then you can look into ozone or UV Sterilization.
I hope this helps some.