I don't own a Tesla. But, I'm certainly a potential buyer. And I'm worried about a lot of things.
There have been a number of complaints from the Tesla-owning Interwebs about various process failures: leasing, repairs, maintenance, inventory, etc. Marco Arment has a few good tweets about Tesla along with a bunch of similar stories from other Tesla owners hanging off those tweets.
I like Elon a lot, but I'm not confident at his ability to be an effective CEO for Tesla at this phase of their existence. Now that the company has broke through and changed the world, they need someone who can effectively lead the company through more boring stuff, like business process and effective customer care. I feel like Elon is more an ideas guy, and not the guy to be leading Tesla post-breakthrough. I feel like the boring stuff bores him.
1. https://twitter.com/marcoarment