How realistic are the Priceton review tests for Subject tests?

Yeah… so I am going to take Math I and Chemistry subject tests and I just wanted to know how realistic the score i get on a practice test ( Princeton review only) would be… I would appreciate any help because i really want to know for which score I should aim for

Math level two tests are amazing… Some questions appeared on the real exam.

And I got the same score

@Argentina2017 how much did you get?

710… But I hadn´t taken precalculus yet