I have had a Liquidator since I built my pool in 2007. I am still using it but will be retiring it this season to test out a stenner setup (I am starting my homework on the Stenner... I.e. Reading all the posts here...). But before retirement I have some further testing to do on it.
The major pro for me is it simplicity and how the salt drops out. The major con for me, I wish it had a better hose connection. It has been the only source that causes my pump to lose prime due to hoses coming off. (I reduced it a bit by cutting the tubing twice a season. The new section stays on better...) Another con, during the heat of a Texas summer it can't keep up but all I have to do is add some chlorine to the pool by hand once a week or so. No biggie. Another con is when my solar's come on, the pressure rises and causes a higher usage of chlorine. It almost doubles the flow rate. (Installed various flow meters to verify this some time ago) I never finished looking into pressure regulators so I just accepted the effect. Which during the summer months turned this issue into a Pro. For I was able to get more chlorine into the pool but I was filling up the unit twice a week. (I use my solar's to cool off the water during the summer nights. I am able to keep the water around 84 degrees in August last year.) Which means more trips to Sams to get a truck load of chlorine. I finally found some chlorine in 30 and 55 gal outdoor rated (black) drums. Turns out that it is also 12.5%. New to me, for my Sams chlorine is 5-6%. It is MUCH nicer to only have to pump out the chlorine directly to my Liquidator verses going back and forth to the garage... Even as the chlorine degrades, it's still stronger than my 5% from Sams...
For the first time, last weekend I started using 12.5% bleach in it. I am interested to see what the results will be with a stronger solution. I am also filling it up to the bottom of the black funnel. I just added some Cyanuric Acid this weekend since I exchanged out the water over the winter.