I have 2 GC500's. Both with MFK and ICOTEC sounds. I'm running there decoy on one also. As far as howls, howling, and locating goes u can't get any more realistic than what comes out of that caller with MFK. There pup distress, hurt coyote ,havoc howl and coyote duet are all sweet sounds. No problems with remote range or decoy. For the money there hard to beat.