I had a loaner Model S while my wife's Model 3 was in the shop for an afternoon. The Model S felt pretty outdated as compared to the 3. It could have been because it was a slightly older model, but the experience turned me off of the idea of buying a used S.
If you need maximum range go for...
Wife has a model 3-- we set it to charge to 80% and charge it to that at night. I think we've charged it to 100 twice in the 6 months that we've owned it-- before a trip. In any case, it is best to charge it and leave it plugged in each night. We only had a 110v outlet available when we...