I took the HESI and got a score of 950 on it the first time. I was told I did excellent and had very good chances of passing the NCLEX. Took the NCLEX 2 months later and passed the first time.
My best friend got 800 on the HESI the first time and they told her she needs at least 850 to 900 to have better chances on the NCLEX. She also passed the NCLEX the first time she took it.