If the problem was fixed under warranty and corrected, I honestly don't think it's all that bad. That is what a warranty is for, after all. Like many have said here, no car is perfect. And as you get into the luxury class-level features, there's a whole lot of things that can go wrong. These aren't manual trans Corollas with crank windows. I have friends and co-workers who drive the whole range of luxury cars, and none has been without problems. My friend with a 335 coupe has had his high-pressure fuel pump replaced twice, and there's still no certainty that the replacements won't continue to fail. A co-worker with an Acura TL had his entire dashboard crack out of warranty to the point where it looked like it had been sitting outside in a junkyard for 25 years. A friend's wife had an Audi A5 lemon law'ed due to constant problems. A friend's brand-new Range Rover Sport with less than 100 miles on it had an electrical malfunction where it kept the right rear brake applied as he drove the car on the freeway, so when he showed up at my house the disc was glowing white hot. Etc., etc., etc.
To me a "great car" is one that I truly love. Meaning I love driving it, I love the looks, and I just have a strong emotional attachment to the car. If I have a couple of relatively minor warranty-covered problems and they are corrected by the dealer and I'm provided a loaner and experience minimal inconvenience overall, that does not make it any less of a great car in my eyes. There are many reliable cars/appliances that are reliable, but not great. It depends on your priorities. Complicated luxury machines with tons of electronics and options are not a good choice for those looking for a car that will never experience a problem.