The Enaly is OK and you can adjust it with a remote control to be "On" for greater or lesser times. There are several selectable duty cycles on the Enaly that give you so many minutes on VS so many minutes off. The AquaSun Ozone model 308 is fully adjustable from 5 to 22 mg per hour and I think that AquaSun's ratings are very real.
I say probably because it costs over 5000 US for an analyzer that will definitively measure ozone output.
There are inexpensive ozone badges available online if you look hard enough that will give you a rough estimation of ozone levels in room air in parts per million. The EPA's safe level of ozone exposure on a constant basis is .04 ppm, .08 in any eight hour work period.