My car came off the assembly line the first week they started making cars in early January. In the six months since the car was delivered to the SC it has spend over 16 weeks in for service for various repairs. I won't go over all the issues as I have posted about them in the past.
One problem which caused multiple trips in for service was a very loud wind noice coming from both the driver and passenger windows. During the last trip in for service it looks like they fixed this problem. This was after replacing the glass and gaskets. The only major thing left to do is to replace the rear tail gate assembly. It is cocked to one side which causes a misalignment problem. They said they will need my car for about 4 -6 weeks to do the work.
Even though I have had a lot of problems Tesla has been good at addressing every issue I have had. We love our Tesla and have really gotten spoiled with the Model X.
My recommendation is don't get one of the first Model 3's off the line. Wait at least until the first 10,000 - 20,000 have been produced.