Re: Fisher lab's F-75 & Teknetics T2
As far as comparing the two, I really can't say much other than these dectectors are made from the same company, First Texas Product, and have the identical enclosures, rods, coils, . . . I have read people complain about the durability of the T2 but I haven't read much about the durability of the F-75. Strange since that have the same exterior

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Obviously have a T2 and I am spending as much time as I can to get to know it better. Being upset about not saving the settings is silly. It takes seconds to set this machine up, there isn't very much to it. The manual is available online so you can read how easy and quick it is to set up. I honestly believe that you should set up your detector for the ground you are searching everytime you go to a site. I actually ground balance and adjust the machine every hour or so just to be sure I am "tuned in" the best I can be. I hear it described as a "hot" detector, it is pretty sensitive to Electrical Interference. I tried to hunt a park that was near a pasture that had an electric fence that surrounded a very, very large field and it was like the detector had a pulse. I thought the machine was malfunctioning till I took it back home and all was fine. The pinpointing on this machine works great! I reduce the sensitivity in the pinpointing, static mode and I can get right on top of the object everytime! The depth reading seems very accurate as well.
I had only used the machine in the All Metal Mode the first 5 trips out and I am truly amazed on the amount of metal in the ground in the areas I had hunted. I use low discimination now and I have started experimenting with the different number of tones, it DOES change the reaction of the machine I have found. I have only hunted with this machine about a dozen times and I am getting more and more confident in its ability. So far I have found my first buffalo nickel, Mercury dime and Walking half dollar at the local park along with a silver fork. My goal for the summer is an indian head penny.
I got mine at Cabela's in the bargain cave. The 5 year warranty still in full effect. I sent my detector back to the factory because of the Electrical Interference I was experiencing at a park and didn't really know what it was. The factory said they had issues with coil connectors so they replaced mine, they replaced the grip because they have a more durable one along with the "toggle" switch for "Fast Grab" Balancing and Pinpointing, they replace the battery compartment because they had an improvement with the battery springs and door ALL AT NO CHARGE. They were pretty quick about getting the machine back to me even though it was in the middle of winter and I wasn't using it. So the customer service is great!
Hope this helps, I love mine and I also own a Whites Series 6000 Series 2 back up machine.