good buy. The small ones that fits the lighter (cost P550-700) will give less ionization that you hardly feel it but it does help in maintaining the "fresh from the casa" smell inside your ride. But for stronger odours (like spilt fish blood from the bayong pamalengke) you'll need the bigger ones (boxy type but cost about P500-600). Pero matapang eto. Minsan you'll feed dizzy so you have to turn it off after awhile of use.