Ok...I'll play along..... I'm the first one to call a spade a spade and tell the bare bones truth about a product....Some do work......some don't.....Some work but may not be needed....others may.....This is just one product that I've actually been told by credible sources that does work for the most part as advertised. The downfall I've been told is cost and aggravation of carrying along and setting up. You apparently have to replace whatever cartridge is in them fairly often and it seems like it was close to the same cost as buying a new one.....If I remember correctly it was like having to buy a new one every year or two. I will say this.....if there was one area where I'd be willing to take a chance and try something it would be with eliminating your scent.