Mice have been making homes in my 2002 Eclipse GT heater core and on top of the engine (and this is an outside car that doesn’t stay parked for long periods of time). I’ve tried moth balls, dryer sheets, Irish Spring soap, etc. and finally stumbled upon this product (Fresh Cab). So far, it seems that Fresh Cab is doing its job to keep the mice out of my car (I placed four pouches in the engine area, one in the cabin, and one in the trunk). It has a Christmas tree smell and a LOT better than the odor of moth balls. I am hopeful that this product will continue to keep the pesky mice out of my car. I also have put strategically placed pouches of Fresh Cab in my garage to keep my other car safe from the pesky mice. I am currently impressed with Fresh Cab and am optimistic that it will continue to do its job. I currently am on schedule to get 12 pouches every 3 months, since the product loses effectiveness after 90 days.
(Update). 2 and a half years after trying this product, it is still doing the job. Very satisfied.