I waited several days to post this,but here goes. I voted poor but maybe should have been doomed.
I've been detecting since the early 90's. Lots of excuses are made for the F75 by people like me that spent a bunch of money and went......huh

I just sold my F75 because of the all the frustration in trying to use it.
My favorite F75 excuses:
"You don't know how to set it up".......Excuse me........... I do know how to setup a detector
"It's recovery speed is "FAST". Where did this come from?? Somebody said this once and now it's true??
"It's noisy because it sees everything in the ground"... I don't' want to see (here) everthing. (This is my favorite)
"Too much EMI".... I want to search where there is EMI. My CZ will
"Your Brian can't keep up with it"... Guess I need to speed up my brain

Then it should include an adjustment for Brian speed.
"Turn the sensitivity down"..... Then I still have an unstable detector with no depth.
"Jumping Display Numbers,Must be trash next to the target".......I want it to lock on. My CZ will.
"It's Deep"...............Deeper than what

Again somebody found a deep coin once and now it's true?? All machines do this from time to time. We have all been blown away by a deepie that the machine we were using should not have made.
For me the F75 was not fun to use like I think metal detecting should be. Too much BS for a detector with less than average performance. I'll never own another "F" series.
True story:
I have exclusive permission to detect one of the oldest universities on the west coast spent 11 months working this with the F-75 . Made a few finds but nothing like I was hearing the F75 should be finding . Most of the time it was just going nuts no matter how I set it. I told my wife I know the stuff is there but the F75 just can't find it. Her response: "You just want to buy
another detector".
Well I bought a new CZ-3D. In an area my son and I had hit hard, both of us using F75's.Went in with the 3D I recovered 236 coins in that 20'x20'spot! 37 wheat's and 17 silvers. Earliest being an 1897 dime at 8". I did not dig one rusty nail or any
bottle caps In the last two months I have found 16 silver rings and 8 gold rings and the the stuff just keeps keep coming.
The CZ did the trick and man is it fun to use! But now I'm hearing batches of the 3D's are inconsistent.