As I have outlined on a number of occasions here on the forums:
Our personal experience with Tesla and the CPO purchase of our fine 2013 Tesla Model S85 has been tremendously positive.
At 57000 km, the car had been well used prior to trade in, and the previous owner transported dogs in the car, and had not brought the car in for service on a number of obvious items, so the condition of the vehicle was concerning. The car was %15 cheaper than any private sale price I was able to negotiate, likely due to the high mileage and imperfect condition of the vehicle at trade in time.
Tesla was determined to make our experience positive, and took 3 weeks to prepare the car.
The car was delivered with a clean interior, brand new tires, brakes, rear headlamps and charging cable (UMC).
We took the car immediately (the next day!) on multiple long distance road trips and put on 3000 km in the first week, and 5000 km in the first two months.
They booked us in for a subsequent service recently where they picked up the car from our house and provided a P85 (with autopilot) loaner.
During this service, they did another full detail of the interior/exterior, added the titanium under-body shield, updated the front brakes for winter with new pads and caps, added the "85" badge (early 2013 cars didn't have these), and otherwise performed additional service on wipers and safety items.
I drove the heck out of the P85 loaner that day, demonstrating it for work buddies, and Tesla returned our car that same evening and took the loaner back.
Total cost $0 and so convenient.
Couldn't be happier.