The predictor is relevant to your potential to pass the NCLEX exam at the time you take the comprehensive predictor exam. It was relatively accurate for my class, at least those who chose to take the NCLEX within 3 months of graduation.
I took my comprehensive predictor in late June with an additional assessment in early July a week raduation (we were "testing" the exam out for ATI) and had a 99% chance of passing. I sat for NCELX that August and passed in minimum questions in less than 30 minutes (which truly confused the computer.
I walked out very shocked and confused but paid for quick results 48 hours later (not a big believer in tricks) and passed.
ATI has pre-nursing assessments, concurrent nursing assessments used during a nursing program, and post-graduation NCLEX prep resources. However the NCLEX prep resources are only availa ble to those who are US educated. https://www.atitesting.com/Solutions.aspx