I used to live overseas and had drivers, so I pay more attention to the back seats than most people do. Living back here in the US, I DON'T have a driver, but I've got kids now. Just babies, but my wife and I take turns sitting in back with them (for now, one's just one and we've got another bun in the oven).
The back seats of the Model S are HORRIBLE. There is, of course, the well known problem of the sloping roof which has me, at all of 5'8" tall, bouncing my head on the ceiling. But beyond that, the seats are angled wrong, and just not comfortable. At the very least, Tesla should have made the seats adjustable a bit for recline as there is nothing behind them. I suspect that Elon's demands for the children's seats in the back might have made that difficult. I suspect the child seats won't be a popular option, so they might consider dropping them if they interfere with the recline of the back seats.
My wife and I went and looked at the new Lexus Hybrid ES this week to make sure before we pulled the trigger and finalized our order. I have to say, the fit and finish of the ES is far superior to the S. And the back seat is FAR, FAR better.
Thank god cooler heads prevailed after I groveled until my wife relented.
So I'm still getting a Model S, but only just.
Tesla: PLEASE IMPROVE YOUR BACK SEATS!