They work pretty good. We only have one in our court yard villa and it runs out of juice before it can do the whole house. We don’t have any dogs so the dirt level is not too bad. The unit can run two times before one has to empty the bin and clean the filter. I see no value in the real expensive ones the have their own cleaning station since cleaning must include cleaning the filter. I have to use my compressed air machine to blow out the filter. The other complaint is that the unit gets lost and can’t find the charging station in a guest bedroom, which requires us to pick the unit up and manually place in back in the charging station. It does keep the floors clean.
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