hmmm that looks cool. There are some minor health concerns with ozone (breathing it) and the liquid would be offgassing during its active 15 minute period.
I don't think you'd want to put any metal parts in the submerge tank because it may set up weird anode/cathode reactions and ruin the passivation layer.
Be wary of the included "booster cartridge" - maybe it has consumable electrodes that will be expensive later.
Looks like something I would want to buy if I had an income right now. If you take the plunge, let us know how it goes!