Don't be put off by all the sounds it makes. Usually it is not chatter, it will sound off on the ground and on every little thing in the ground but when you get a signal you want to check out... sll the erronious sounds will disappear when you go to pinpoint. Start off in factory preset and don't be afraid to reset it if it seem's to become unstable. Sometimes using notch and raising the disc will cause it to become noisy and a quick reset will fix it. Sometimes you can have something notched in or out and not realize it. It is very easy to have something notched out and not realize it because of notching something in and then lowering the disc and forgetting the notch... and the other way around. Watch the slash marks to be sure, If you lower your disc to 0 and there is a slash anywhere then you have something disced. Also sometimes after using notch it just doesn't seem to come back to normal, like somethin stay's a little noisy... if it does that, reset it.
Have fun! You are going to love the F75 !!
Julien