Took delivery of my 2015 P90D last week. Love the car, but also loved my 2013. Aside from the performance, is there really a difference worth the upgrade? It's a decision I struggled with for 8 months before finally pulling the trigger. The auto pilot software was what finally put me over the edge. Beyond that and Next Gen seats, can't say there's really much of a difference. I got the same joy out of my 2013 as I do the 2015. The 2015 allows me to show off its muscle to friends. Is that worth another $33,000?? That's for each individual to decide. The next gen seats are certainly nicer, but not quite as big of a difference as I expected. The Auto Pilot feature so far has done more of scaring the crap out of me than it has been a useful tool. Jury is still out on that one. Assuming it will get better with time. Overall, absolutely love my new car, but at the same time, I loved my 2013 too.