After reading some of the material at the website you referenced I'm at a loss to explain why anyone would wish to consider any product sold by this company. I don't know very much about ionizers but the amount of misinformation presented about salt cells and chlorine santitation is staggering.
For example, on the page entitled "Seven Secrets Salt Water Pool Sellers Don't Want You to Know" it is suggested that pool coping must be "resealed" every year because it's being etched or "corroded" by salt water. Really? I've had a salt water pool for ten years and have never sealed the coping.
"Cantilever designs simply disappear as the stone dissolves away" (Mine hasn't)
What could the following assertion possibly mean?
"You must worry about the pH with a salt system and do regular maintenance or you will destroy the pool and have zero recourse."
I worry about lots of things but this isn't one of them! Zero recourse to what? Testing pH and performing regular maintenance is required for every pool, no matter what system of sanitizer is used.
Really, I know the salt cells are pricey. But wouldn't buying a cell replacement be easier and cost less than buying a entirely new technology? That's leaving aside whether the replacement technology is actually an effective sanitizer.
You may want to search for "ionizer" in threads on this site for more info.
(IMO it's really hard to beat chlorine, whether generated by a SWG or introduced via bleach, for residual sanitation and algae control. I test CYA level often to make sure the chlorine / cyanuric acid ratio is good - see Poolcalculator.com)
My 2 cents.