I just started using it a few months ago and it's helped some what. My initial problem was peeing outside of the litterbox but now that I've added 3 more litterboxes it's stopped. I also use cat attract litter. You can either buy it online or at Petsmart. It's a bit pricey but you can also add it to your regular litter and this should also help.

Right now I'm still dealing with aggressive behavior from my alpha male cat Storm. The feliway plugins and spray help but not entirely. I do notice when the plugins are getting low because my cats seem to be more stressed out. I'd say that you should give it a try. Most pet stores will let you return them if they don't work. Good luck.