The quality on the 3 is fine. I've heard so many panel gap anecdotes and "fit and finish" problem that I was a bit excessive in my inspection of my Model 3 before I took delivery (November 2018). It was fine. There are no quality problems that I've been able to ascertain. The only real kind of weird thing is the polarized glass on the roof turns a really strange but beautiful color when it gets wet.

The car drives like nothing I've ever driven, not even a higher end mercedes.