I have been using the can call for several years. I use to say that it did not work......That is until it did. I never leave home without it now.
I arrowed a buck last year with the help of the can.
I just finished a rattling sequence, I looked out in the field I was hunting beside and there stood a buck. I quickly stood up and hit the can call. He came right inside the woods and walked right by my stand.
Two years before that I saw a BIG buck walk up a hill 75 yards from me. I hit the can, and about 10 min later he was standing behind me blowing. The sucker circled me and busted me, but I really believe he was looking for the doe I was mimicking.
I don't think this is a magic call, I do know it will work if you have a hot buck looking for a doe.
Also want to say, I think the can is even more effective if you use it in combination with rattling and grunting.