I like having a soothing plug-in as it’s sometimes necessary to have a pet sitter come in and visit our dog, and we are forever doing DIY and moving things around – disrupting the dogs environment and routine, basically. I was pleasantly surprised when this actually worked. I don’t really like Adaptil as it seems to make our dog really dopey, she doesn’t interact very much when we use it, so I wanted to try an alternative product. I can definitely notice a difference when this is plugged in and I’d say it starts to take effect within a few hours; dog is fairly chilled but still curious and playful. It’s a shame the smell is not more enjoyable; it’s very earthy, however it is a ‘natural’ sort of smell, not offensive just strong. For that reason it loses a star. Pleased it’s cheaper than Adaptil and does just as good a job for our dog.