I would give this product 20 ********** if I could. Carry one in my purse at all times to combat Hawaii’s critters who looooove to bite me. My kids are getting them for Christmas and I’ve told my neighbors about them. Works immediately. May need to repeat in an hour or two, but it’s quick and easy to do. Leaves a circle from the compression but that disappears in a moment and is better than scabs from itching. Slight pain involved-about the same as when you press on a bite with a fingernail to stop the itch. So very glad to have found this. Just ask my husband!