I have a performance 85kw non-sig black:
-So much torque, car/wheels/tires not really built for it. Wheels will break out on you, even in straight away sometimes so you have to be careful. Wider tires might be something to look into.
-FM reception is weak for me as well. I also get an echo sometimes while listening to the radio.
-I have a booster seat in back (at least until the rear facing seats show up) and fastening the seat belt around the booster is tough.
-3G map loading can be laggy. Hopefully they can start caching that map data now that Google allows.
-I wish wireless was working so I could just tether my 4G/LTE phone to the car and have much faster internet.
-I also wish the car went to high suspension when driving under 5 MPH to make sure you don't hit curbs when parking, I have not yet, but its been really close.
-The big screen can be really bright at night, I have it down to like 8% I think now in night mode.
-No cup holders in the back is a pain. 2 cup holders just stuck on the other side of the small middle console for the people in the rear would be perfect. 3 kids so the console in the seat idea won't work for me.
-Put on 19" with snow tires, it drove great through our first real snow in Colorado this year. About 4" and no problems at all. BTW, I can't tell any difference in ride quality from 21" to 19".
-Service center and delivery specialist were awesome to deal with
-Car is SO FAST! :)
-Love the big screen for controls, never had any issues not having tactile controls as I use the wheel controls for what I need there.
-Nav is great, best I have ever used in a car. I love how it fills out the address usually for me after just typing a small amount.
-Always being full every morning when I get in the car is awesome.
-Most common term I hear when giving test-drives/rides to friends is that this car is "the future" and I agree.
-Big opening in the center is perfect for my wife's purse or my backpack. Really glad nothing is in that space. Its more useful than I realized it would be never having that as an option before with the transmission always being there.
-Getting in the car to an update with a ton of new features is just incredible. To think a car company wants to keep improving my car even after I have paid them is so great.
-I think Tesla succeeded in their goal of making the greatest car in the world. There is no other car I would rather have for any amount of money. Love this car!