My favorite production friction call is Knight and Hale's Ol' Yeller. Very easy to use and good sound. As far as custom calls, I just picked up a Kaiser Kall after last season. I agree with Weasel and Mike Bell. Very nice sounding call. Mine is double sided, glass on one side and slate on the other. Excellent craftsmanship too. Andy Kaiser makes a great call. This one just may give my Ol' Yeller some competition for my go to call this season.