I have the low end model, the Ideapad s540-14API, with Ryzen 3500-u as CPU and Vega 8 as GPU.
I have to say: This laptop has a huge Wifi communication problem, far beyond notebookcheck reported.
The wifi speed is extremely slow (around 0,3 mb to 3mb) and it seems depends on the network card, the Realtek 8821-ce. There is no way to have better speeds: I downloaded (and tried) drivers both from Windows update and the official site,changed the bandwith in the network options, stopped energy-safe options, tried speed on other wifi networks, reinstalled the OS from scratch but nothing changed. The laptop is extremely slow, compared with other laptops. Moreover, it is not possible to replace the network card without avoiding the warranty, as Lenovo indicates in the hardware manual for this model, that wifi card is not a CRU (a customer repleaceble unit). There is no ethernet port and Linux support.
So as ultrabook is practically unusable, whereas as gaming or office laptop you can find far better solutions.
I was a huge Lenovo fan, but now I'm extremely disappointed.