Look over your car very closely when picking up. I picked mine up from the factory on Thursday, and I noticed weather stripping not completely in place and asked about it, and was told "oh, that's normal." Assuming the person giving me the keys knows more about what's normal or not, I dismissed it. It's super busy at the factory right now, so you're kind of shuffled through in a group to get your car. I drove off without testing things or looking at details. I was kind of excited to finally get my car!
The first time put the car into drive after having it parked, the driver side mirror opened half way. The 2nd time I drove it, it actually
fell off. Neither mirror angles down when going into reverse. This was a pretty frustrating experience, so when I got home I gave it a really good look-over and noticed quite a lot of inconsistencies in the lines of the car where various panels or lights come together. There was a scratch in the trunk plastic, and a small window ding/chip in the windshield.
I suppose I don't know what is "normal" for Tesla, but coming from BMW, the lines and material stitching are nowhere near as clean. My guess is that the factory is under pressure to push cars out by the end of the year, and it's showing in the product.
I was able to get the car into a service center today, and was told by the service center that they usually have 20 service technicians, but right now they only have about 9 because the Fremont factory has taken the others. My guess is to fix the glitches.