Pros: Easy to use, no lasting smell.
Cons: Don't work very well.
When I noticed that my cats were afraid to walk on the rugs I realized I had a flea infestation. I tried the frequent vacuuming approach to flea control (that is really a pretty good control method), but it never gets all the fleas and I hate vacuuming. I finally decided to fog.
USING: These are pretty easy to use. Take anything out of the room you don't want insecticide on, turn off fans and AC, shake the can, put in the center of the room and leave for an hour.
RESULTS: Mild, not unpleasant smell upon first entering the house after fogging, but it went away after a brief airing. There is no persistent insecticide or fragrance smell. Fleas appeared to be gone for a day or so, but they were really just feeling lousy and apparently stayed in the rugs till they felt better. Three days later the fleas were feeling much better and jumping again. True, there were fewer of them but that won't last long.
My opinion? These do not work very well. The insecticide is not strong enough to get all the fleas, and unless you get them all they just come back. The label says a second fogging may be necessary in two weeks, but I need one after only four days and my flea population wasn't that bad to begin with. To get rid of fleas with this product might take multiple applications. Frequent vacuuming appears to work just as well or better than these foggers.