Never had much faith in the deer calls, but this year I decided to try out a TrueTalker. I've used it a couple of times with deer visible....usually they didn't react at all. Last weekend, I bleated to a doe & fawn about a 100 yds. I didn't think there was any reaction, but climbing down at dark, the deer were almost directly under my stand - I spooked them, but I feel confident that they were coming to check out the TrueTalker.