I have the 2016 (a 56) that I picked up 2d hand. No real pitfalls. It is a very nicely spec'd bike and a real deal. The parts group is all very good. I would have liked a higher quality wheelset. The rims are very adequate but that is the weakest link in the bike.
I'm taller than you are but my inseam is a bit shorter. I'm happy with the 56 but I also could have ridden the next size down. I think you are likely to be better off with the 54. In any case focus on the top tube length. You can always get the bars a bit higher.
Last edited by bikemig; 03-10-17 at 12:21 PM.