I have been using that Primos esterus doe bleat can.
On opening day 10/01 I called in a doe with it from about 75 yds. It may have been just a coincidence that she came in my direction I don't know. On 10/31 I saw a nice buck making a scrape again at about 75 yds. I flipped over that can and he came directly to me no doubt. However, I was unable to cast an arrow (see 10/31 check in thread).
I haven't actually been able to get any other deer reactions to the call. Based on the above though, I more confidence in this call than any other I have used.
Supposedly a fawn bleat works well to bring in does. My theory is that is only true in the real early season.