I did. Although I was told it wasn't tracked, just used on the road.
My previous car, an IS300h, was also a Toyota press car. The only issues I had with that were it was one of the first ones to be manufactured and so had a couple of minor issues that TSBs were issued for and all sorted under warranty.
My GS is a 2016 model so any issues found in the first 2015 models would have been resolved.
There are so few Fs about you almost don't have a choice, Press and demonstrator vehicles seem to account for a lot of the ones for sale - more so for the GS compared to RC.