Got it yesterday evening

It is big challenge after having several ThinkPads but keep in mind it is a
790 Euro laptop, not a 3000+ Euro workstation.
Build quality
Surprisingly good. Both case and display lid are very sturdy, no creaks, no wobbling on table. You have to remove two annoying stickers.
Screen
The screen is
amazing 
. The resolution 2160x1440 is perfect with 125% zoom, I could also use 100% later I think but now I feel more comfortable with the 125%, the default 150% is too big. No backlight bleeding at all, contrast is also very good, but not the best one thought (still far better than most of ThinkPads have).The
3:2 aspect ratio is the strongest feature for me, I use my X220 docked with 4:3 monitor so I finally have portable computer with useable screen. The more I use it, the more I realize how stupid the 16:9 aspect ratio is for work. No more taskbars on right edge, there is enough vertical space again. You can never get such screen in ThinkPad.
Keyboard
The biggest challenge for a ThinkPadder, but there are no longer good laptop keyboard layouts anymore

It has 1.2mm key travel so it is better than MacBook, the feel is good, not soft and definitely not 'mushy' like the terrible Dell XPS 13 keyboard, and not noisy. Keyboard layout is actually better than current 6-row one on ThinkPads, navigation keys (Home/End/PgUp/PgDn) are clustered on cursor keys via [Fn], I still like it more than having PgUp/PgDn and Home/End on the opposite side of the keyboard. The Czech layout has long left Shift, no useless key between (short) left [Shift] and [Z] many other laptops, including ThinkPads, have. You can set two levels of backlit or turn it off. There is also Fn-Lock to have the F keys available.
Touchpad
Touchpad is big and similar to Lenovo T440 "clickpad". I use external Bluetooth mouse as I don't like it in general. Yes, I miss trackpoint here.
Noise
I haven't detected any coil whine usign any power settings. The fan (two fans) are noisy when you reach constant 50% CPU or more, but there is no annoying high-pitched noise like the X220 have. Fans runs quite often, it is a typical ultrabook.
Software
There is no crapware (trial AV, Google Chrome etc) preinstalled. Windows 10 Home Build 1809 installed on March and Huawei application for updating drivers and BIOS, similar to Lenovo System Update. It had updated four drivers and BIOS. There is fingerprint reader integrated in power button and it works very well. When you push it, it scans the fingerprint during restoring from hibernation, so you don't have to touch it second time when the login screen appears. SSD (WD) has two C (Windows) and D (Data) partitions which I don't like, you can remove the D easily in Windows Disk Management. There is additional 14 GB system restore partition.
My overall impression is very good. Of couse
it would be nice to have 16 GB RAM, 512 GB SSD, touchscreen, Thunderbold 3 ... but again, it is 790 Euro laptop. I got much more than any ThinkPad would deliver in similar price level. If you need more, you can always spend your money on Microsoft Surface Laptop.
Is it a good replacement for any ThinkPad? No, it always depends on your preference. I don't expect it will last 7 years like my X220, but I use it as a second portable laptop, not the main workstation machine.