We have a SOG. Has nothing to do with breaking down the waste. Just a better smell "retarder"! When you flush you must hold it open for a few seconds so the smell is extracted. Would I buy one again? Yes. But not a "must have".

In reality all a SOG is is a fan that vents the smell to the outside. It creates a negative pressure in the waste section thus preventing the smell from coming up through the toilet. But for it to work you must give it a few seconds to vent to the outside.