I'm super happy with the deterrent spray. My two cats were very night liebebedürftig and in between she jumped wildly on the bed, so I was forced (for a peaceful sleep) shut out the cats at night and allowing the bedroom door at night. However, then began the nocturnal scratching and terrible screams at the bedroom door, so I could not sleep well. In a desperate search on the internet I found this great spray - now is quiet again and I can sleep soundly through! In the evening I put the spray laterally to the door and activate it by the knob back (can be switched off, if one night short times must go to the bathroom, but it wants to leave). The motion detector works for me immediately and trouble-free! At first I heard several times during the night, the "sizzle" of the spray when the cats came near the door - and then the wegrennenden cats. The hiss was from night to night less, now see the cats spray and then go no longer in the vicinity. I suspect even if the spray would now go empty, they only when the spray because the door is at rest leave. Was its price absolutely worth it! The spray is odorless (only a puff of air) and does not hurt the cats also perfect solution and strong buy recommendation for people who also finally seeking a peaceful night's sleep!