Glow plug it's excellent overpass my expectation,is so great I try before many different products they didn't work I live on a humid area and due the rain always there is that humid smell on my car,since I purchase plug in car freshener now when I get into my car I feel that soft and nice smell no more that anoying humid smell thank you folks for such of great product I personally think is also great for health issues due it takes away those nasty smells thank you so much.Orlando from corvetteway

Okay so they smell dies after a couple days, but the light looks very nice in the car. It adds such a glowing happy feel especially at night. For that reason alone I think it's worth it.

I bought 2 of these for my cars. The only way you can smell them is to put your nose right up to them. They give absolutely no smell in the car.

Does not last long, but the first 2 hours it smelled great now all i have is the blue light which is also cool.

This was cute and the light nice at night for that first two days it lasted before dying..not a good investment.

These are pretty good items they make your vehicle smell better. The only thing I found is if your car is like my Mom's truck, her's stays on all the time even when the motor is off. I don't know, but this seems kinda like a fire hazard. But I gues it's not because they don't get warm at all. Overall good product.

This is a fun air freshener. It's a very bright red and emits a nice soft scent. The cobalt is very cool to look at but the summer breeze scent was undetectable.