honestly, I think they are junk, though I think the rep could do a better job. If they are junk, he needs to be puttin in his opinion.
primos stuff is good, as are Rockies mountain Game calls, and hunters specialties. Any of their single open reed calls in tandem with a diaphragm (2 or 2.5) will get the job done well. like mike said, it never hurts to have several. also, the E.L.K rubber band call (the old one thats been around forever) still makes very good sounding cow calls. I used to think it was generic lookin, old, etc... but regardless the thing produces right up there with the hyper lip single and hyper hot cow. Learn to use that diaphragm reed! My opinion.