Y'know, the thing that I really love about this forum, as well as all the forums here, is that every time a pessimist chimes in, all it does is add support for the product even further, and we gain even more knowledge based on real field tests. Admittedly, there are those who purchase aimlessly, and have expectations without actually digging into the science by putting in the hours (no pun intended).
I never owned a Tesoro (and I have owned alot) that didn't produce a distinct audio signature target response; this is why I love Tesoro products and get great results on every outing; I am always confident about what i am about to dig with my Tesoro(s). This being the case, it is quite obvious to me at least, that the pessimists are bored, and have never really honestly put in the time with a Tesoro...and some say that they have...but I tend to believe that they are bluffing, because their view is so one sided, insistent, and spiteful. I also really like how everyone keeps their cool with our beloved pessimists, afterall, its always good to have em around for an opportunity to authenticate our tool of choice with a collective sample of real experience; from those who actually put in the hours and rigor to learn the capability of the detector in the field; in their geographic environment(s).
Happy Hunting!