I have been buying this product for many years probably around 10 or more. I bought them when they first came out under the Perk brand and have been using them ever since. Although I've tried almost every other brand over the years, this one keeps coming back to me. Pros: Flavors are generally very pleasant. I haven't tried them all, but my favorites are black ice, a new car, and summer underwear. They are not as obvious as many others that stand out like a parrot. No big logos or flashy colors that make your car look like a second class taxi. The scent lasts pretty well. Without ignoring what others have said in their reviews, you usually get about two weeks less. This is equal to or better than most reasonable competitors. But even the ones I use at home change every two or three weeks, so I really won't complain. The price is at least here on Revain. I just bought 4 packs of 4 each for $8. Only downside is that I wish the scent would last longer. They were used when they first came out, but since they've sold out they seem less effective. But, as I said above, no worse than the competition. Overall, this is a good choice to add atmosphere to your car. I'll probably keep buying them for another ten years.
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