Mike,
I do alot of fire & flood, but I personally don't like using ozone machines in someones property. I have 6 small ozone machines from cleanair systems and a large sonizair from the states, and would not rate them against the large ionizers we use.
I used to have an ozone chamber for decontaminating elctrical items reverted back to the ionizer.
I used the ionizer in a large church hall smelling of sewage got excallant results just after two days. The small ozone we use on water jobs do seem less effective.