Tuxedo is a small company, not far from Munich, Germany. They have specialized on assembling customized laptops that are guaranteed to work nicely with Linux. They are owned by Schenker. You can think of them as the Linux department of Schenker.
I bought a Tuxedo XUX707 almost 4 years ago, which they built to my ridicolous specs: a desktop (!sic) i7-7700, GTX 1060, 32 GB RAM, 2x 2TB SSHD, 17" 4K monitor, 1x HDMI, 2x DP. I need a computer that has the performance of a desktop PC, but that I can take along once in a while if I have to. The cooling of the Tuxedo is superb, the screen is fantastic, sound is good, keyboard is ok, touchpad not so much. This "laptop" is bulky and heavy and makes only 3 hours on the battery and of course it is like this, because the cooling needs space - the CPU alone consumes up to 65 Watts. Who else would build you such an unreasonable device, Linux-ready, with a 4 year warranty (extra option)? I love this beast more than any computer I had before and the price is unbelievably cheap compared to a Dell or Lenovo or a MacBook with similar specs.
I run a second 4K monitor connected to one of the 3 video outlets and have currently 16 USB devices connected. I later added a M.2-SSD-drive (there is space for one more).
After two years I dropped the computer and the body cracked - not bad, the computer continued to run nicely.
After three years the GPU developed issues - random black screen on boot, which disappeared after a couple of restarts. It took me some while to diagnose the problem and make sure that the NVIDIA card was the culprit. I contacted Tuxedo support. They answered within 24 hours, had me run a system report script (which I could inspect before), and sent me the stickers for free mailing of the device to their headquarter. I asked, if I could send the device without HDs and SSDs and they were happy with this and told me, that they make the tests with prepared SSDs of their own. The device was checked, they confirmed a damaged GPU and decided to replace it as guarantee item without costs. I asked them, if they would replace the cracked body parts in the process and that I would pay for this. They agreed. All communications was per email and with fast response times. Just a summary: they agreed to process my device with no storage devices, made no trouble because of the cracked body and quickly deciced to replace a GPU that had random issues. Try this with Apple!
It got even better: when the device came back, I put in my storage devices and everything was working perfectly.
The body was completely replaced (two parts) for 60,- Euro. No assembly costs.
They noticed a Kensington adapter in the housing that I had forgotten about, removed it from the broken part and returned it in a separate bag.
I had no idea that the M.2-slot could be connected to a dedicated heat pipe so I never installed a heatpad for it. They found, though - although I had removed all storage devices - from my system report, that I used to have a M.2 device built in (which was not part of the original computer) and put the missing heatpad in place.
Finally, obviously because of all the nerdy stickers on my cover, they included a bag with more nerdy stickers and some Linux magazines.
The service procedure was not fast: they check the problem at Tuxedos Headquarter in Augsburg, then send it to Schenker in Leipzig for the replacement and assembly, send it back to Augsburg for final quality control before they deliver the device back to the customer. For me this is not a big problem: if the computer is away for more than 24 hours, I have to switch to a backup computer anyway (in this case a Lenovo W520). Tuxedo does not have the size and logistics for super fast service. But the quality of the service, in my experience, was stunning.