I had previously posted asking questions about this thing. And I was shocked now many people were aware it existed. So I took the plunge and ordered it ($27 from Amazon) I'm on CD 16 (I think got to double check) and should be ovulating now or soon. So if anyone is interested in finding out how this works or IF it works I will keep updating daily results and pictures if I can of the test results. Maybe the end of OPKS for me. And for those POAS addicts... This thing is reusable and you can test multiple times a day if that's what you want to do.