My advice, look at the range you get when the car is fully charged. Then give it a good testdrive with your average driving style...don't baby it as it will give you a false sense of the range you can expect. At least 20 miles. Take the actual miles driven and subtract from the original range estimate....does this match the range currently shown? If so, and you can live with that range, and you can live with another 15% degradation over the next 65k miles, then you're in good shape.
If you intend to drive in cold climate and want to use your heater, that will take a good bite out of your range. AC doesn't typically decrease your range too much.
If you intend to drive up a mountain...or large hill...expect your range to take a hit as the car will start to estimate your range assuming that you continue with the same driving condition. This is also important to note on your test drive. The range decrease for this driving condition is expected. If you go down a hill, then the opposite is true...you'll get more range added to the total.
There are ways to display the math I mentioned, performed for you, on the dashboard, but that is too much to explain. There are plenty of articles in the forum here about determining the remaining capacity of the battery, the nuances of the guess-o-meter (estimated range), and even some data from others regarding degradation.
Best of luck. A fun car to drive.