It works to some degree like all calls. All deer are not going to react to it and at times you may have a deer run to it. It's a social call, the "contact call" and can be mimic'd with any call that is adjustable. For instance, with my River Valley Game Call Deer Flute, I can quickly adjust the brass slide from a buck grunt to an area where I can mimic the can. It works great having that quick adjustment without first blowing a grunt call then moving my hands to flip the "can". Much nicer and less detectable. See this link as well.
http://www.huntingnet.com/forum/tm.aspx?m=1702493