We have a cat who is highly anxious and urinates on our furniture. We tried Feliway along with other techniques such as additional litter trays and covering our couch with aluminium foil. Feliway seemed to assist with helping our cat feel calm.
We have two cats who are both over 10 now and have had some issues in recent years with blocking behaviour and stress, along with some fighting. While there has been some minor fighting still, our bully cat seems to be less inclined to push our other cat out of the way when eating which is a fantastic thing.
When we first adopted our cat he was terrified of other people and loud noises. Since using Feliway he has completely changed and his bubbly personality has now come out! Now that we have the diffuser it's easy to just top up with the refills from World for Pets!