I don't use a predator call. This is me calling on a 3 day bear hunt with a buddy I just got back from late last night. Nevermind the foxpro sitting up on the bow of the boat.
Seriously though, my wife got me a foxpro for my birthday. Great little unit and much better than the Johnny Stewart I had before.
If you want to get really serious use decoy dogs (live dog, not taxidermist), but that can get expensive.
I have the Wildlife Technology call and would say its the best made now. As mentioned before it had several pieces and there were some issues. The latest, I think it is called The Atom, is completely contained in one waterproof unit. I think Wildlife Technolgy sounds are the best sounding. I have hunted with several guys with Foxpros, good useable calls, but I personally think they are a notch below Wildlife Technology.