I've been using the rufffy dog, and ruffy dog coaxer for distress calls, and a yeller dog mini howler for challenge calls and pup indistress. I found the ruffy dogs easy to use and very effective. I know lots of guys say they call a stand for 15 min and if nothing shows they move on. On 2 seperate occasions I seen yotes after my first sequence at more then a mile away, each time it took them 45 min or longer to work them into shooting range. At that distance I really rip on the ruffy dog, as hard and as long as my lungs will let me, it seems to get there attention, the a couple of challenge barks and it'll put them on the move. Both times I was out of visual contact for over 10 min at a time, but with patients the seem to show up, ussually where you lest expected them.