CS-X3 Squash Air Spencer Refill - 2 Pack JDM Car Air Freshener for Fresh & Long-Lasting Fragrance - Perfect for Cars, Offices, and Small Spaces

Really pleasant smells. Comparison of this to those trees you hang in your car, or those cams you can open and set in your car, this system is a lot better. The smells don't feel harsh. They smell very mellow, yet strong. I give it a 9/10, only because it's size. Compared to any other product, this does take up space, about the size of your phone, and it needs to lay flat. Leaving it on your dash is not the best idea, because even though it comes with a rubber gripper it can fly off when making tight turns, quick accelerations, or stops. It is thin though so maybe you can place it under your seat without worry of it being damaged if someone moves the seat forward or back