Hello everybody,
just want to share you my exam results and experience. I passed the OCPJP 8 Upgrade (1Z0-810) with a score of 81% (65% was minimum).
For my preparation, i bought Mikalais preparation:
http://java.boot.by/ocpjp8-upgrade-guide/ and i bought this mock exam preparation training:
http://www.myexamcloud.com/onlineexam/viewStudyPlan.html?s=qcLSFRvZllU=
It took me about three months, until i was ready to take the exam. And at the end, i achieved about ~80% in the mock exam- which was nearly at my exam result
I tried the 1Z1-810 (Beta-version of the ocpjp 8 upgrade) last year, but failed there with around 50%- that beta exam was really hard, especially the time per question was too less.
Good luck to the others!