Gary, as matrem pointed out, they can hurt more than help when not used properly. Also, if you want to get a mature buck, refrain from using the "el cheapo" scents. Purchase quality products with no preservatives and from one deer. Also, when using scents, use the proper one for the proper part of the season. Such as, In pre-rut a good Tarsal gland with Buck urine in a mock scrape will do wonders along a known active trail. Another one is a fairly new product called "herd in a bottle" or something like that. It is a collection of urin from many "relaxed" deer and it will send a signal to a cruising deer that there are other deer in the area and it is "safe" to enter that area. Some of the cheap crap scents out there will SOMETIMES attract a mature buck but rarely. They will bring in your yearling deer that aren't educated. One of the best things I have found in 40+ years in the field hunting white tail is to take the Tarsals and the urine and bladder from a fresh kill, put them both together in a ziplock, put them in the freezer (preferably not one the wife uses unless you don't like certain parts of your anatomy in the location that they are currently in) And use that for next season. There are many scents out there that the only thing they will attract is your wallet. Do some research and get only quality scents. If you want a good list of them PM me and I will be glad to help you out.