Feliway refills are easy to use and there is no smell noted to humans yet seems to help calm cats.

Pros: easy to use

Cons: expensive

i have 5 cats. The interkitty interactions were not as nice as i would have liked. Since i've installed these i have almost no hissing and spitting. They still will occasionally get fussy with each other, but they behave together much better. It's really worth it.

Pros: helpful

Cons: expensive

Feliway helped calm my cats when we moved to a new house, always a stesser for my cats. The previos owners had dogs so their scent was in the air. Putting feliway in a few rooms helped callm my kitties so they settled in sooner than I had hoped.

Pros: made my cat calm down

Cons: cost

This is a great product to use in a animal facility with multiple cats, or in a new home. I have moved a few times with my cat -- since using this natural pheromone product, my cat has been more relaxed and adjusted easily to his new environment!

Pros: easy to use

Cons: can be expensive

We have several plugged in so the refills are always on order. They seems to work as well as anything. I can't get the cats to behave in my office,but this works well everywhere else. It is a good product

Pros: Works a part of the great mystery of why?

Cons: cost