People complain about the truss rods and the bridge . I've only adjusted my 4001 twice . Once when I got it somewhere between fifteen and twenty years ago , and once again last year . Very slight tweak last year . I have it set for medium low action . You can dig in without rattle . It's easy to play . Set up the 4000 after buying it this year and hope to get twenty years in before I have to touch it again too . My experience with the older style truss rods has been that they are incredibly stable . The bridge is a pain to adjust , but I haven't had to touch it since I set it . Not an issue .