If you have a USB-C port on your MBP, this works without any problems. However, I agree with U_waefler. The Thinkpad can't be switched on via the cradle, and at the same time I had resolution problems that I no longer have with the MBP.
I use the USB-C Dock in combination with a Thinkpad 13 and am unfortunately very disappointed. Unfortunately, the Thinkpad cannot be switched on with the lid closed via the power button of the USB-C dock! There are others on the Lenovo forums with this problem but I have not received any help to date.....