A really good product which worked so well for both my cats on bonfire night, they seemed to be more relaxed and spent most of the night asleep – despite a noisy, noisy bonfire night. Actually its best to start using product a week or so before the actual event or whatever to ensure the remedy circulates thoroughly. I plugged mine in a week before bonfire night and it worked like a dream….. these are a must have if your cats gets stressed.