The only time I can say for sure that the "doe in heat bleat" can call has worked for me was up on Anticosti Island in Canada during peak rut.
I was in a snow squall still hunting and decided to sit under an evergreen and wait it out.
While going through my pack I found the call that I forgot I had packed.
I turned it over three times about 5 seconds apart and put it down. Was I surprised when I caught movement off ot my left. A wide racked buck was trotting in my general direction. When I threw up the scope I got and eyefull of snow and quickly wiped it out with my thumb from my trigger hand. When I found the buck in the scope I saw the outline of a very wide rack in the now blurred scope. As it ran through an opening about 50 yds. in front of me I took the shot. The buck went down after a short run. When I got to the downed buck I noticed that it was only a 4 pointer.
2 long tined Y's, 20inch spread with 2 small bumps for brow tines.
I was happy I called him in and got him but was a little dissapointed that it only was a 4. That was until my guide told me that it was the largest 4 pointer that he has ever seen taken from that outfitter.

So, for what it is worth, the call definitely worked there!