Hardware wise - it's most of the way to being a great laptop, but has a few aspects that seem "designed by committee". The 4K screen looks really nice, keyboard is pretty good, it's quite fast, battery life is good. But, the trackpad is massively irritating - it's constantly picking up the heel of my hands while typing and causing the cursor to jump and click. The webcam is terribly located, the TB16 dock is a piece of junk, speakers only sound OK if you're working on a hard surface. They still use a barrel connector for power - would've preferred to get power over USB-C (which the dock uses to provide power), and have a second USB-C port on the laptop.
There are several issues with Linux support - if you're successful making an XPS Hackintosh, then those won't be a problem, but I'd encourage getting the lower resolution screen if you're considering the Linux route.