If any of you are looking into Nexus and the SPS exam, I highly encourage it. It was a great add on from the PSM1 and really a good prep for my journey towards my PSM2. As far as tips, honestly just follow the reading materials on the page for the SPS exam. I looked at the exam created by one of our awesome PST's Simon Kneafsey and the Mlapshin practice exams but honestly neither really provided any info that was found on the exam that was not already covered on the SPS Open that's available here.
Truly, read the Nexus guide multiple times, buy the Nexus Framework book, and look at the multiple White Page docs that talk about Scaling Scrum found on the link below. It was a challenging exam but if you study the correct info you should have no problem earning your SPS. All the info you need is right here:
Yes, many of the questions on the Open Assessment were on the exam but truly, if you don't read the Nexus Guide and the study pages available on the link I posted above, I believe it would be very challenging to pass the exam. Basically, don't think you're ready for the exam primarily based on passing the Open Assessment several times at 100%.