FD, My personal input would be that if you can get some time beforehand, go for it. It wil let you get a feel for the aircraft and hence reduce stress before the assessment, and perhaps reduce workload during the sim. If you become too good at flying it no doubt they'll notice, but what are they gonna do if you fly well? I believe a large part of the assesment is also how you work with the person next to you, brief, solve problems etc. I did a bit (2 sessions?) of fixed base basic jet handling in a generic 737 sim made to look like a classic (EFIS panels displaying analogue clocks). This was to prepare me for flying a jet (BAC1-11 sim back then) which I had never done before. No doubt it helps to go in prepared! If you put this much effort in now, then hopefully you will do the same when it comes to doing the real Type Rating. Good luck to all!