You also need to remember that most people don't come online to post everything went perfect and that only a very small percentage of owners are on a forum like this. While you should definitely hope for the best while preparing for the worst, I think the chances of encountering a fairly serious issue with your vehicle is pretty low.
Ultimately, as long as you come into this understanding what to expect and have your eyes open, you should be able to make an informed buying decision. Can you have issues upon delivery with the build quality? Yes. Does the service center and customer service suck? For sure. Is the car amazing? Definitely.
Just know what's acceptable to you and what isn't, then buy or don't.