Like reviewed previously, initial smell is strong. I suggest closing the "vents" for the first couple few weeks. It is the best air freshener on the market to my knowledge. Long lasting and great aroma.

At first the smell is really strong and sort of gives off a bubble gum oder.. after a few days it calms down and gives off a nice unique smell..

Well although the unusual Squash smell comes on like gangbusters at first, after a week or so it provides a nice, sweetish background smell that is quite nice to my sensibilities. My initial purchase included the CS-X3 case which really isn't needed unless you want to make it part of your interior decor. I put mine under the front seat. The first refill lasted more than 8-weeks but I imagine that warmer temperatures will increase the rate of off-gassing significantly and, thereby, shorten its useful life. Most importantly, though, I like the smell!