Sorry bro, but I've never heard of NDEITA. ACE is well-respected but the test is a joke. I can't believe they let people train if they only have this cert. and no degree. If you are gonna train at a reputable club they may require a nationally recognized cert like ACE, AFAA, NSCA, ACSM. If you have a degree in the health field take the ACE exam, its easy as hell (speaking from experience).