Good Knight mosquito repellant is really good because it works. With no fumes around or need to change the tablet everyday, I found this product really very useful. Although I was using the tablets of Good Knight only, this has made my night really royal. I have simply put this machine along with my night lamp plug. So when I switch on my night lamp this also starts its work. My children sleep without disturbance so we sleep well and we all get up in the morning fresh to face the next day with all the energy and without any blood loss.