Smells like Licorice
My barn cat isn't allowed in the house as he's a bit feral and destructive.  But he snuck in and left a small marking near the back door before I put him back out.  I cleaned it up with special cleaners, but my indoor cats started going right there by the door.  It took 2 weeks of daily, sometimes twice a day, applications, but my indoor cats have stopped going in that location.  Now I still spray it every few days for good measure.  I've also started to spray it on my outdoor grill, as I noticed the barn cat laying on it in the nice Spring weather.  I don't want to start using it and have him burn himself!  I've noticed he now prefers to lay on the patio furniture.  Overall I think it works well enough.  It did discolor my tiles to a slightly orange tinge for a while.  They came clean eventually but I suppose it could stain some surfaces if you need to use it heavily.  I wouldn't say the scent is unpleasant, but it is odd.  It smells a bit like licorice, and if the cat urine smell is still lingering and mixes in with the product scent it's noticeable for quite a distance.  For me, that was a temporary inconvenience to solve the problem, though.
Rating: 4 stars