All good callers usually make one call especially well. Having said that, I carry about 4-5 different types of callers and I would hate to be without any of them. If forced to choose only one, it would be my Morgan Caller. With this caller, I can yelp loudly or softly, I can cluck loudly or softly, I can purr contentedly or with aggravation, I can cackle, I can cutt and although I used to be able to gobble well on the caller, I now can only gobble respectably because of arthritis in my dominant index finger.
As a deal closer, I prefer the wingbone, but I am not so versatile with the wingbone as with the Morgan Caller, hence the choice of the Morgan Caller.
Why be good when you can B-Mobile or Spin & Strut.