Superb value pack. This is amazing stuff and calmed our cats down when they were bullying one of our other cats to the point that they no longer do this. It has an incredible effect – they go soppy and seem to tolerate each other with no scrapping. The smell is noticeable but I don’t find it unpleasant- more of a herby smell, although I have switched off the diffuser after a while to stop this. You do get used to it and it’s not an issue. Buy it and try it – it’s worked for us!