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Works mostly as advertised. I have a Lenovo X1 Tablet Gen 3. I can connect 2 additional monitors so can have essentially 3 including my tablet. My monitors are quite old, but still work well except for with this dock for some reason. Have tried updating everything I can think of/find to update. The display of the desktop wont fill the whole screen. The screens do work when attached to other computers and other displays do work when attached to the dock. Just these ones I have don't seem to work 100%. Other than that a few notes: I noticed after buying and setting it up that it doesn't have an audio output other than for headphones. USB mice/keyboard connected through the dock seem to need to be re-recognized each time the device is connected and will only be recognized after logging in. So, when freshly connected, must use the tablet to login.
I used it on my X1 Extreme gen 2 and after going into BIOS setting and turning the thunderbolt 3 security off, my cpu got fried. Repairshop must replace cpu which is very expensive. I dont even know if warranty covers this. This garbage of a product might have cost me a $2.6k laptop.
I realize the X1 extreme wasn't compatible after the matter but it should not completely destroy my CPU.
Finally i decided to write something about the performance with macOS.
Well, everyone knows this is a pretty tb3 dock, and i use it with my DELL 5290 2-in-1 (2* tb3 ports), everything works fine, power delivery, DP output 4K@60zh, HDMI output 4K@60hz, ethernet, extra tb3 port, all checked, it is a perfect dock if you want to a reliable TB3 connection.
However, in my scenario i also want to use it with my macbook pro, 2017, 15inch. the fact is, i can't get the 4k@60hz from its own DP/HDMI ports, i have to use USB-C to DP/HDMI cable to connect it through the tb3 port at front panel, otherwise i have to run at 4k@30hz@HIDPI OR (QHD@60hz but without HIDPI). i have tried to intall the latest firmware through its website but no luck, it's really bad but we cant blame lenovo. anyway they designed it to support its own laptops (windows), the macOS support will never on its roadmap. but still a bit shame.
Nov 2019, yesterday I updated the dock firmware to the latest 3164 version by a windows laptop, then switch back to macbook pro with macOS Catalina10.15.1, now I can get the 4k 60hz from the dock's dp. great work. the problem is, it looks the power supply of the dock are not sufficient for the macbook pro anymore. the battery of the macbook pro drained quickly after i connected the display to the dock's dp port. not sure if its firmware issue or i have too many payloads here. then i have to use the original power supply of the mbp to charge it. after did some research, i connected a secondary power adapter to its 230w port, now the dock is chargd by two power bricks and then it can charge the mbp again. all done now.