1. Backlight, although they are an advantage, but in this case it is rather a disadvantage. It's great if it works statically. But since the guys decided to save the battery - the backlight turns on only when you raise your hands, and instantly turns off when you remove it. And it cannot be changed in applications. The problem is that the backlight does not turn on instantly, with a micro delay. And in work, when hands are brought to the keyboard every 10 seconds, the constant expectation of turning on the backlight is annoying. You can turn off the backlight altogether, but the lettering on the keys is so dim that in the twilight everything merges into one color. So it turns out that when you take a fleeting glance at the keyboard to start typing, even blindly, you don’t see where to start, and a reflex expectation is developed - put your fingers on the keyboard, waited 100 ms, and then looked at it and started typing. In the attached photo, I tried to depict how it looks due to the backlight of the monitor and low light.
2. Layout. Traditionally a short left shift, a huge escape for some reason, because of which the finger constantly confuses F1 F2 (escape where F1 should be, and F2 where F1 should be).
3. Key travel. It's also an advantage and a disadvantage. On the one hand, a short and soft stroke, on the other hand, there is no clear tactile feedback. Well, that is, pressing occurs in 2 stages: make an effort, and feel the tight work of the spring repelling the key back. Classic laptop scissors, but not in the same way as implemented in poppies. There is a clear understanding that the key has already reached the end.
4. No leg adjustment. In general, it is not critical, since the form factor does not allow you to do such things, a matter of habit.