I'm really getting frustrated. I fully expected some issue buying my Model S but I'm at a point where I lost my faith. I'm on my 5th drive unit and the exact same problem keeps coming back again and again. It gets this annoying buzzing sound at low to medium acceleration. It's so noisy that people are turning their heads when I drive by. What an embarrassment for a high class EV! If this happened once I'd be fine, but now it's due for it's 6th drive unit for the same problem over again? Tesla obviously can't fix it. They keep putting a bandaid on it and 15k miles later it's making the same noise again. Same with an annoying suspension/alignment issue. The service center swapped out my wheel hubs once and when I got it back, the car would 'fishtail' left or right depending on whether I accelerate or regen. It actually becomes a safety issue driving on a freeway. The entire car starts pulling left and right. Believe it or not, I had it back at the service center 4 times to get that fix and it keeps coming back again and again. They seem unable to fix it. After only 2 years my car has been in service more than all my other cars I have ever owned combined and what makes it so frustrating is that I know, no matter how many times I bring my car back in, the same problems will keep coming back again and again. It's so frustrating to see how Tesla is focusing all its efforts on the Model X, the new features and Model 3 and has no interest in fixing those early cars that paved the road of success for them.