Popped a fresh refill in last week and my car still smells like a walk through the woods. The pine scent is strong without being overpowering, and swapping it in took all of ten seconds.
Samuel U.★★★★★
I was skeptical about the 30-day claim but it's been almost a month and the pine scent is still going strong every time I start the car. Clicking in a new refill took about five seconds.
David★★★★★
Swapped in a fresh refill and my truck smelled like a Christmas tree again within an hour. Nice that each one lasts about a month, so I'm not constantly messing with it.