get one made after March of 2018
This often splits opinion.
Having just had driven a 2017 model X 100D for 2 weeks while my Raven MS LR was in the shop, I can say the MCU2 is way sharper and works. The browser on the loaner was dead, and maps really sluggish in comparison.
The loaner X had 6 seats which looks fantastic if you need them, but doesn't leave any trunk, so not great for luggage based on 6 passengers. Also the X had 22's fitted. What a noise! Getting back in the S was heaven.
However, the X is really practical inside.
The efficiency difference really struck me too. On the same run 480wh/mile in X compared with 350 in the S.