Works, generally
Feliway generally seems to work for my elderly cat (adopted about 7 months ago). However, any environmental change (new or moved items on the floor, etc. ) tends to stress her, so she will occasionally pee on certain rugs, but not regularly. Fortunately, they are machine washable. Feliway obviously did not do its job there, but overall it seems to help in generally calming her. I've used it for my previous kitty while I was away for a long time with her only seeing the cat sitter once a day, and it seemed to help her quite a bit in our new home. So, she was under double stressors at the time and Feliway helped.