I've used similar nav systems from BMW, Subaru, and Toyota and they seemed like lame software running on a 5-10 year old phone. Poor touch screens, smaller screens, poor voice recognition, and poor nav. I'd rather they just have an aux port for music and let me hang my own tablet on the dash somewhere.

Overall fit/finish for the model S was not as nice as an Audi I've been in, but was plenty good for me.

The model 3 is of course substantially less luxurious. Single smaller display instead of two displays. Many less buttons/switches. I've only done a test drive in the 3. But I do have several friends that have switches from S to 3, or 3 to S, and they speak very highly of the 3. No doubt the 3 is built to a much lower price point, and you can tell. I think part of the Tesla plan is to have you touch nothing but the steering wheel or the display. I suspect the voice commands will get better over time, they already handle nav and music well.

But when it comes down to it, I'd pick performance, handling, and range over more expensive interior.

Not like Audi, Volvo, or BMW is selling anything close to the model 3 price and range. I drove a Chevy Volt (comparable on price, but not so much on range or performance) and it was nowhere close to the model 3.

Who is willing to buy a slower car and pay 50% more for 2/3rds the range just to get a nicer interior? Not me.