I've been using an X1 Carbon running Ubuntu (18.04 until 19.04 came out, then upgraded) with Gnome 3 for about a year and some change as my primary development machine.

Hardware-wise I have no complaints. It's incredibly light, excellent battery life (no specifics, but I made it though an 8hr work day in a coffee shop), the keyboard is fantastic, and the multiple USB type-C ports are super handy. I did grab a sleeve for it as it isn't aluminum like the macbooks.

My only gripes are linux related and relatively small. I never got the fingerprint reader working, and with the company being attached to Outlook/Teams/Excel, I sometimes find myself wishing I had desktop apps as opposed to web-based ones.

Regardless, it's the best work machine I've ever had. I've used plenty, and this edges out the XPS 13 just slightly, as the keyboard is superior and the screen is about an inch larger.

edit: I do only have the 1920x1080 screen, which I'm sure contributes to the excellent battery life.