Dunno what a good brand is but I noticed since using it that the dust in the car settles down pretty quickly then stays down kaya kung may allergy ka, it's a good thing to have (I think I just bought the 2nd to the cheapest).
i use to have a samsung air ionizer....kaso nasunog ko....can't find one anymore.
i replaced it with the one sold for P500-600 sa concorde...yung small one that plugs directly sa cigarette lighter...it took year or more before it konkout on me.
now, I'm planning to use the imarflex (tig P5000) na room ionizer...hindi pa lang napapag-isipan kung kaya ng inverter ko (kasi pang 220v)