As long as the school you are applying to has pre-candidate, candidate, or accredited status from ACPE you are pretty much safe. It could be argued that pre-candidate or candidate status is iffy because those schools could fail getting accreditation, which is required so their students can get licensed. However, that has never happened and ACPE has strict guidelines that pretty much guarentee that will never happen.
Hypothetically, what would happen if you go through a 4 year program (as the first graduating class) and the program does not get accredited? Was the four years a waste? Can you transfer to a different school?