I've been a Model S owner for over 7 years, currently own more than one(wife's car is an S too) We recently got the new LR MS
Pros there is no comparison to other cars, just drive one once and you'll be hooked. Supercharger network is great and enables long distance travel to be pretty painless.
Cons, there is now almost a 9 month wait for a new Model S.
BTW- this is our 4th Model S and we had to pick up each in Scottsdale (or Tempe one time) The new center in Tucson should make that problem go away, We do have a great service team in Tucson, currently located at the airport, but they will be moving into the new center when it's complete.
I should add- that even with the service center, many times they have done remote service at our house. Great group of people there.
Also, there is a quite active owners club in Southern AZ. PM me if you'd like a more info about it.