It works fine on ThinkPads. Unless you are using Linux, where 4k@60Hz does not work due to lane misconfiguration (maybe this is fixed by now?). On Macs, I have found this Dock to be a complete disaster. It would often not charge unless you plug/unplug the Dock several times. Also Ethernet often doesn't work (it uses a Realtek NIC). I had two and sold both of them, because they are practically unusable with Macs, and replaced them by Startech Thunderbolt 3 Docks, which work great.