Unfortunately, I have topped out at 590 on a MGMAT CAT, and just got a 520 this morning on another MGMAT CAT. My highest on a Kaplan
CAT was 550. This is 6-7 months of prep work too...
I took the next week off from work so hopefully I can increase it enough to crack the 600 mark.
I am still running out of time on the CATs which does bother me, I have taken at least 10-15 CATs, and I have reviewed about 75% of the questions. I was never too good at these kind of tests but I will continue to do problems, review the work and repeat.