I was going to add my 2 cents yesterday but held off. I think the other thing to look at is that, according to the performance charts on the site, you would need 2 of these to chlorinate any pool larger than 20K gallons (unless I'm reading the chart wrong). That easily puts you into a regular SWG purchase price if you self install.

I actually think it is a cool idea and actually makes sense in a way. Sure would be easier to add to an existing pool compared to cutting in a new SWG. But I have to agree that the SaltShock stuff plus the clearly limited flow makes me leery. Where I think this WOULD work well is in an Intex type doughnut or small AG.