USB-C ports to docking stations and second displays were broken for two months, with no ability to rollback the BIOS version.
https://forums.lenovo.com/t5/ThinkPad-Z-series-Laptops/Exter...
Recently it's just started freezing up for no reason.
Last fall they pushed some update with f'd up the fan (didn't run enough, overheated). Then another that made it run too often. At some point in there something got pushed that messed up the TPM config or something so my whole Windows partition install had to be redone.
For the first 5-6 months power mgmt generally was a nightmare. Especially in Linux. Much improved lately though.
Not recommended. Maybe the Gen2 is better.