I had great results when I field tested the Scorpion. Called in 4 on the very first stand where I ever turned it on in the field. Had the onboard speaker playing at volume level 20 into the wind, which was about 10 mph. The 4 responded from at least 600 yds away, maybe further as I couldn't see over the hill to the other side. When you hook it up to a SP-55 or a TOA speaker, it has all the volume you need and then some, with no distortion. The only flaw I could ever see in the caller, and it wasn't a flaw to most people, is that you have to operate it with your remote. I like the ability to run the FX5 or the Fury manually or with the remote. That way if your remote has a problem, your trip isn't a flop. That is a personal preference though, and most people couldn't care less about it. It is a great little caller and very dependable.