I've never had much luck from the can, but I do think it works. If I didn't, I probably wouldn't carry it. I do know that it won't spook deer, so that says something. I usually use a cheap grunt call that I've had for years and don't know who made it. Rarely do I do any blind calling, but I've jumped deer while going to and from stands or just slipping through the woods and have grunted them back and shot them though. As long as the wind was right.
You can fool their ears and eyes, but if they ever get a whiff.........GAME OVER!!!![:@]