+
Well, also from first hand:
Apple authorised dealers are even better than Apple. And I'm not joking. I had just two experiences with Apple stores for repairs, one in London, Regent Street, other in Wien. First one worked like a charm, my MBP 2011 had a faulty battery, was only 2-3 months old. I explained I was on a business trip, and couldn't wait for repair. They didn't have the exact same model, and gave me a (slightly) better one! That was my first repair of any apple device (but been their user since only 2008), and I was delighted.
Second one was in Wien, but this time it was a 3 day old iPhone that simply couldn't turn on anymore. I waited for more then 2 hours, and was refunded (they didn't have any new iPhones in the store). Was pissed for waiting so long, and then going out without a smartphone.
So to put things into perspective. I work in Croatia. Our Apple authorised dealer and service is iStyle.hr. And I have returned more then 10 MBP devices in just last 2 years (hi Butterfly keyboards). Never waited more then 2mins, got excellent service, got replaced or refunded (depends on the occasion), and the staff was more then forthcoming.
Same thing goes for Hungary and Bulgaria. You get the same excellent service as Apple store provides, but without any waiting. I only waited once, but by experiences from others in this forum, and other online communities, that seems to be the norm for Apple. Of course, they are very popular, so it's to be expected. But with authorised service you get the same treatment, but without any waiting for long periods of time.
Granted, my only experiences are with the countries listed here, so I can't speak for any other shop or country. But I get the feeling that authorised sellers/service are really afraid of user complaints to Apple, so they all out to accommodate you.
To put things into perspective, try to get service for any other product in Croatia. Even if they are formally represented in my country (HP, Dell, Lenovo, Samsung, HTC, Acer, etc.), and play the lottery. I order my equipment from amazon, and for that I pay large amounts for shipment, customs, taxes, etc. I could go way cheaper by just purchasing in Croatia, but I don't do that. Why? Well, warranty for any other company besides Apple is a complete joke!
P.S.
Except OnePlus, they are excellent. But they sell just phones, so...
Well, you could have made this post a week ago...

I already ordered X1 Carbon instead of SB2. My main reasons where keyboard (even though everyone claims SB2 keyboard is excellent, I haven't tried it, but I do know that Thinkpad keyboards are top!), and the most important one was TB3 with X1C.
If I had known that, I would 100% order SB2 to try it out.
And this is the problem with reviews these days. Most just put out specs, say a few things about throttling, run some benchmarks, few words about ports, screen and keyboard. And that's about it. Ohh, I forgot. They also play games and give us FPS for some popular games.
But most of them never go into such details that are crucial for productivity. FPS in games is obviously more important