Model X 90D took delivery May 2017. Just recieved it back from being at the SC for approx 2 weeks. This is its second trip to the SC. Collected and loaner supplied on this 2nd time which was appreciated. Since the initial trip to the SC, I have been building a list by sending emails to myself with time and date stamps on everything niggle/issue we have been having. A few weeks ago, the car whilst in auto pilot suddenly swerved across the motorway into the middle lane. I caught it half way accross. The motorway was perfect. (interestingly at a supercharger, I asked the guy next to me if this had ever happened to him, and he said 'funnily enough, it had and just that very day for the first time' (thats not a coincidence surely) This was the final straw so I sent it off. Sat Nav, Auto Pilot, wont lock, returning to car with door open, doesnt present doors some of the time, doors dont close some of the time, screen goes black, etc etc etc. It acts with the consistancy of a small child, yet its supposed to be software driven. I love the overall tech of the car, the fact its electric and the overall design, but having spent £111k on my Model X, I feel constantly upset, annoyed and to be honest like I have been wripped off. Should I keep with it and support Tesla and sack it off and maybe get one in a few years when/if they produce a more stable version. The autopilot issue is my biggest concern. The guy I spoke to who said his had done the same that day, said his drove towards a lorry. I thought it wasnt supposed to do that as it has sensors? It was very windy that day so I wonder if that was anything to do with it, either way Tesla were so conccerned about it, they didnt even bother to take the details of this guy when I raised this issue to them. I have asked them where I stand on getting money back, or requesting a brand new car as I reckon I have been sold the Friday model!