We currently own a Model S. My wife prefers to sit up higher, have more storage and passenger space. Her current SUV is ready to be traded in. The X would be perfect for her. She is not opposed, but not enthusiastic either. (Serious range anxiety. It is justified given where she is likely to drive. Something the SC network, through, 2015, will not solve.) So we have discussed and continue to discuss. Until very recently I thought it was a very good idea, even with the justified range anxiety issues....until.
Until I realized that would not leave us with a "slow" vehicle that our teenage children could borrow. Occasionally this is a must. We have not, and will not, allow our teenage children to drive our S unattended. They simply do not possess the restraint to drive it safely.
I don't expect the X to be any different, perhpas worse with two motors.
I have asked in prior posts (software enhancements) for Tesla to implement a "teen" mode whereby we can restrict both the acceleration and top speed. Password protect and then I'm fine with allowing them to drive it.
With this realization it is highly unlikely we will get an X. I will keep my reservation in the hopes that this enhancement can be made.