I run the T470S. Moved from my T420S in July. Couldn't bare to give it up, but the battery/power plug were shot. We run the X1's at the office and tried to use one, but I don't like the keyboard/touchpad. Nothing compares to the 420 or before, but I found the 470S to be better of the two.
470S has ethernet built-on, X1 requires a dongle. I don't want to carry another cable on my travels. 470S can dock with a dock (old school/underneath connector) or a USB C dock. I have the USB C dock here at the house and used it maybe twice. Went with the USB C because of desk space. The USB C can be placed somewhere else with all the connections and the cable just dangle on the back of the desk. I do miss the old school dock. Just walk in, push it down and rock and roll. Less wear and tear on the USB C connector too. If you use a mouse on the right side of the laptop, the USB C is in the middle of the right side, were your mouse will be. I don't use a mouse, only the touchpad, so it doesn't bug me.
Mine
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psref.lenovo.com/Detail/ ··· HF005MUSI'm picky about the keyboard and mouse because I use the heck out of it, so touch and feel of the device was practically make or break it for me.