Ubuntu works fine on the Dell XPS 15 9500 laptop I use for work. It came preinstalled with Windows, but I shrank the partition so I can dual boot. (Having all data encrypted-at-rest was a requirement which made things a little trickier.)

The only weirdness I've encountered is some crashing in some lid-open-or-closed software, probably because I tried to make sure it wouldn't sleep just because I wanted to carry it to a conference room.