RE: Just bought the "Buck-roar"
A bunch of friends bought this call last fall. I wish I had the photos of the bucks they killed as I was impressed enough to buy the call myself. One friend growled at a buck that was 200 yards out (after a quick rattle sequence) and the buck came in on a rope, roaring back all the way. An arrow at 30 yards finished the job on a 7 year old 10 point.
I'm usually not the band wagon jumping gadget guy, but that call works. I called in a couple of bucks first time out with it.
One word of caution, with the "growl" call, you might scare off young bucks.