I have had tremendous experience with Surgent. So far I am 2/2 with Surgent…my practice test scores for BEC were solid 80s..I took my BEC exam 7/19/2019 and my actual score ended up being a 77 (passed first try with Surgent)..then I proceeded to study for my expired REG exam, the night before the exam my practice exam score was an 87 ( I only took one practice exam)…I took REG exam on 10/2/2019 and my actual score ended up being an 85.!! So to answer your question, in my experience, the practice exam is pretty close to your actual score. Of course everyone is different, but if you are scoring solid 80s on your practice exams, then you will be golden.
AUD - 80 BEC - 77 FAR - 75 REG - 85
Frank Sinatra and Rocky IV movie/soundtrack helped me pass the CPA exam.