My core PRS was not setup well when it arrived, the action was way too high. I called the dealer and emailed PRS, and they said it was good for the sustain. After suffering for a year, I did my own setup including the truss rod adjustment to the PRS specs after watching some videos. I lowered the action, but got buzzing from the 12-15th fret on some strings. Earlier this year I took it to Chicago Music Exchange for a setup, and it's like NGD! Plays so much nicer, feels better, and sustains the same as far as I can tell. Wish I had done it earlier.