I bought it just halfheartedly before leaving in Spain and where, each year, we serve meals to mosquitos! Whether my children, my husband or me everyone used it regularly. My 10 year old daughter made him alone and stop when it warmed too (she had 20 in his head). By cons, if the button has pus or was scratched you can not do it. Furthermore it works even if you have been stung two days before. The only thing is we remade every day on the same button or he was recovering scratch but it is a lesser evil!