well I personally like to use mouth calls and rattle manualy (ive seen some electric with rattle on there if your wondering) but really the electric calls are ok because you can have almost 6 different calls in one small speaker, if you want get your mouth call and grunt, or what ever you are gonna do then play the same thing you did with your mouth on your electric and see which on sounds better or more realistic to you and use it, but really thats just my opinion, I like mouth calls but I bet some electric calls are much much better than the ones Ive usedm, I bet theres even better mouth calls than mine but really it just comes down to what your oppinion is,