NBME exam at the end of first year?

Hi everyone, the school I attend gives us an NBME exam that covers the material we have gone over in our first year (systems based) which includes biochem, immuno, heme/onc, micro, cardiac, respiratory and renal. The NBME exam had faculty-selected questions, where all of the questions had a correct response of 80% or more on the USMLE. I was just wondering if anyone had experience with these kinds of exams and how well they can predict true USMLE performance?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums