I got the Z13 as my personal and loved it so much I got the Z16 for work.

I was very displeased with the quality on the X1 Carbon Gen 9 I had for work before that, felt like a $400 laptop. Just creaky thin plastic everywhere, the click buttons worked 1/10th of the time, awful trackpad. Also the the crtl-alt-fn key placement on the X series is ridiculous.

basically I wanted macbook-level hardware quality, with easy Linux support (save for the now-long-gone butterfly keyboard issues) I figured Z series would be the closest thing and it has really delivered.

I wish there were an in-between size - more screen real estate than the Z13, but not as gigantic and hefty as the Z16.