EPR is personal choice or preference.
There are only 4 choices...1, 2, 3 and off.
I suggest people try all the options and just choose the one that feels the best to them regardless of the setting.
I just tried each setting and I do "thank you" for the information and I'm going to keep trying.
With the S9 there's also something called a "Patient Setting" besides numbers 1 2 3 and I don't know what that is.
I am still having problems with lots of anxiety though and I'm going to post about it with a different subject now.