I have my company laptop on it and a multi function dock on the shelf below.
It is very adjustable, but is stable once assembled.
Can be a bit finicky to put together, but perfectly manageable even without the accompanying guide.
It has some sort of rubbery, anti-slip on the feet and the arms holding the laptop. No need to worry that you'll push it off the table and the laptop is perfectly usable while on it. Weather it is keyboard, fingerprint reader or touchscreen.
There is no grips on the side holding the laptop in place, so you don't have to worry about ports or exhausts being blocked.
I am using it with a fairly light 15" laptop on the lowest it can go. I don't think I would like it fully extended with something heavier than that.
All in all a good space saver for your desk.