So this marks a little over 6 months of owning our X. We have a 6 seat 90D with every option except Premium Stereo and dual chargers. Overall I am very happy and we only have had one visit to service to remove a broken trim clip that was rattling around inside the driver door. The X performs very well and other than the occasional gremlin doing things like opening a falcon wing door for no reason, the software is 99% bug free. The only thing on my "bugs me" list is my streaming audio seems to cut out for no reason even when I have a good LTE signal. It will last anywhere from 2-10 seconds. Also if I am listing to a song and park the car, when I return it starts the song over from the beginning. Before the software upgrade it would remember where the song was and start from that point. This just started happening after the last software upgrade. Other than that the only engineering issues are lack of folding seats in my model, lack of storage and lots of road noise similar to a Honda of Nissan. My particular unit has good build quality and a nice fit and finish. Mine was a August 2016 delivery.