Also keep in mind that the website is incorrect in stating that the source of the rising pH from chlorine generators is from the basic/alkaline chlorine generation. As we know, the usage of chlorine is acidic and exactly compensates for the initial basic/alkaline nature of chlorine production so the net result is pH neutral (this post describes the chemistry).

Since the true cause of pH rise in pools with chlorine generators is the hydrogen gas bubbles that aerate the water pulling out carbon dioxide that then gets outgassed into the air, the use of this automatic acid dosing product will result in a reduction in Total Alkalinity (TA) over time (just as periodic manual acid addition would). That's probably less of a hassle as the TA drops relatively slowly, but it is something to test periodically and adjust.

Richard