dont buy any of the shelf stuff. it may stop a deer because of curiosity but most of that stuff is so old it smells like rotten pee. take some tinks or code blue and pour it in a clear bottle. looks nothing like urine. bust a doe bladder and look at the urine not even close. check out these guys me and a few other hunters i know use it and have good results.
http://www.blackwidowdeerlures.com/ the thing that got me trying their sent is they take urine from southern and northern deer. kinda made sense to me.