Recently I took PSM I certification and my score was 81%. Lost by 4 points to attain the certification. Now I am trying to work hard and pass next time.
Few things I would like to point out here.
When I started to prepare I came across many forums which said Mikhail Lapshin and MPlaza simulated exams are closer to the real exam. Sadly that is not true. You can use the exams to gain understanding and self analyse where you stand.