I called in a few coyotes with hand calls in the 70s and early 80s. Then I bought a Johnny Stewart cassette tape caller. That caller was a game changer. I wore out that caller and replaced it with another JS caller, and then several Foxpros. Ive not used a hand call in 40 years, but I usually carry one as a back up. My success has improved tremendously with e callers, both because over the years I’ve learned a lot about coyote calling, where/how to set up, expansion of places where I can I call, night calling and overall experience. Nothing wrong with using hand calls, but I’m staying exclusively with e calls.