Hi all,
After passing CDS and PPP last year and then a long lapse in testing, I decided to transition rather than take SPD. I got overly concerned about the Site Planning vignette and just couldn't get myself to practice it. I had done a lot of multiple choice studying so I just went for it. Here's what I found.
This was a hard exam. It's fairly esoteric and a lot of the planning and programming problems are more like puzzles than questions. You don't need to know information, but you need to work through them slowly. The new questions take longer. The lag time issue exists, but didn't bother me. My exam was part of a 30-40 minute nationwide crash, which was terrible.
I found this harder than PPP. I got a screen that said likely pass, which was good, but it was challenging.
Also, don't restudy CDS much.
I'm happy to answer any reasonable questions!