I recently bought a Teknetics Patriot. I have been interested in this detector since it was released and finally found a deal I could not refuse. I have owned another Teknetics 13kHz detector that had EMI issues in the urban areas I usually hunt in . I was afraid that the Patriot would exhibit some of the same behavior. Fortunately, even on the default settings in Program 1 (discrimination mode) the Patriot was very quiet and needed no adjusting except to turn up the sensitivity!!!!
So far, I have really enjoyed detecting with the Patriot both for its detecting prowess and for its outstanding ergonomics. It will easily detect accurately past the 5" level in my two to three Fe3O4 bar mineralized dirt and is an absolute joy to swing. It is beautifully balanced and feels like a 2 pound detector not a very nose heavy almost 3 pound detector like some of the Fishers and Teknetics that do not have a battery box under the arm rest. It should be a great relic hunter, a good prospecting detector and has already proven to be a very fine coin and jewelry hunter.
If you are considering buying one of these, read up on recommended settings for the F70/Patriot. Lots of good information on this forum and two others that will really help setting it up for your conditions.
I highly recommend this detector either for a relative newbie, intermediate user, or a very experienced hunter in need of a mid single frequency or backup detector.