The Thunderbolt 3 dock I was using before was Dell’s TB15. And that dock had one huge problem: When you use it to drive dual 1080p monitors, one of them will likely go unstable and black out, either because the dock itself overheats or for some other reason. The only fix is to pull the dock’s power cable, plug it back in, and wait for the damn thing to reboot or snap out of it. Then the problem goes away temporarily. Yes, temporarily. It’ll blow up again soon enough. If you’re only running a single display, you’re probably fine. But I couldn’t put up with it, so I threw more money at the problem and bought the official ThinkPad Thunderbolt 3 Dock.