I have a TrioPure (50,000 Gallon Model).
It does a combination of Ozone and Saltwater Chlorine Generation. Below is my experience with this device:

At first I had a horrible time calibrating the thing, mostly due to my own plumbing troubles....so it didnt create any Ozone and just chlorinated.

The amount of Chlroine it generates is low....and I had to shock regularly due to Algae problems.

Once I got the Ozone portion working it seemed to do much better and I was able to keep my pool at ~1ppm Chlorine with sparkling blue water. I do still need to shock occasionally due to Algae but thats largely due to my horribly pitted plaster pool.

I am in the middle of resurfacing the pool, so I have high hopes of having a nice low-chlorine pool this summer. I'll be sure to report my results.

The information above is correct, Ozone does Nothing to Algae.....which to me is a primary reason to keep chlorine levels high.
The Idea of the Triopure is to use the Ozone to quickly kill on contact the bad stuff that goes through the filter and let the chlorine do its job over time.

I'd be curious about others experience with Salt-water Chlorinators.....is it true that chlorine generated from salt is more "pure" or "concentrated" and therefore more effective than chlorine in a bottle?

BTW....swimmers were Very very happy with the low-chlorine salt pool...once I had it free of algae that is The difference was very noticeable.