In my car was a sort of musty smell, which I immediately perceived negatively when boarding. The A1 Odour Killer I sprayed the evening on the seat cushion and the headliner. The next morning, the only times when driving closed down the window, that the stuff was out again. After the A1-smell was gone (still took 1-2 days), I could see no more odors. Now, about 4-5 weeks later, the musty smell is still gone. Could not be better.
The bottle still feels after a full treatment at, so it is very economical. Even if I have to repeat the treatment every 3 months, it would be the price still all times worth. Unrestricted recommendation from me.