Hi "V" and welcome to the forum!
Many here (myself included) seem to feel that the auto-calibration modes generally do a very good job of setting speaker distances, but are otherwise not the best choices for the EQ and crossover settings that are factored.
I know that the best EQ setting for my 3805 is "off" and that I prefer to set the crossover settings myself. If you already owned the mic, I'd say give it a try and see how it works for you; if you don't own the mic, I think the money is much better spent on the audio meter and a test disc!
