We too are at almost 4 weeks, and 1100+ miles on our Signature Performance, the first delivery in western Canada. Our first week with the car was unfortunate. We are adventurous folk, and attempted a 900 mile road trip to eastern WA in winter weather just 3 days after pickup in Vancouver.
Alas, 200 miles in, the car threw a cascade of warnings, and after we stopped to charge, she refused to go any further. Tesla pulled the logs from the car before we had even made the stop, and the Seattle service center was alerted and called us. The logs showed a previously unknown hardware fault, so the car had to go back to Seattle on a flatbed. Tesla rented us a car, covered our extra night's lodging, and kept us informed every few hours, while we continued to my wife's parents' in an agonizingly dull ICE SUV and enjoyed a great family Christmas. The only pall over Christmas was that everyone was so disappointed not to see and ride in our Model S.
On Christmas eve, a Tesla design engineer in the charger group fingered the problem to a minor component, easily swapped out, and after a four day hiatus, our Model S ownership was re-started on firmer ground. I tell this story in this thread, just to honestly include an example of a rare early disabling problem. According to Tesla Service, such disabling problems have affected only 1% of the first ~2500 deliveries. For a new company with a revolutionary car architecture in a brand new factory, with recently trained workers, this is really quite amazing.
Were we a little disappointed, sure. But the honour of being an early adopter of such a phenomenal automobile is absolutely worth it in the end. I am glad that the problem happened to us, with our patience and tech savvy, and enthusiasm for the company. Tesla service, especially James Maddux and his boss Carl Medlock, handled us with grace, professionalism and kindness, under extreme pressure to deliver the Q4 quota, and somehow enjoy the holidays just a little with their own families. Bravo, we say!
So beyond this rough start, how has the car been for us? Just as the OP said-- it is a marvel of conception, design, utility, beauty, comfort, and performance. I too, am a "car guy", having owned a Ferrari 360, a Mercedes SLK, an Audi A8, a Lancia Zagato, a Mitsubishi 3000 and others. The Model S is head and shoulders over all of them in overall quality of ownership. It is the first vehicle that is truly of this century, and an extraordinary accomplishment for the team that created it.
i believe that there is such a thing as being an entrepreneurial customer. Buying this car now for me was an act of willing a brighter future. I fully embrace participation in improving Tesla and its products by being a thoughtful, obsevant and communicative owner. Many scoff at the perils and inconveniences of being an early adopter. I scoff at the cynism and fear that refuses to accept the possibilities of innovation writ large.