I have a number and most work pretty well, howevermy most used are the Primos Imperial Palate diaphram(red - double), hyper lip single(reed) and hoochie mama. While the Hoochie is limited it does replicate a great mew, I leave mine on the middle setting and squeeze it while blowing via mouth. By far the diaphrams are the most flexible interms of calls and I wouldn't hunt without one in my cheek.