"Don't buy Dell" has been my rule for years, but the XPS 13 was supposed to change that. This is the same hardware used in their "Project Sputnik" Linux Developer laptop running Ubuntu.
Most reviewers gave the 720p model very good ratings. It's very unfortunate that the 1080p model seems to be having issues (see my top level comment).
I've suffered enough with Dell that I'm never going to buy another Dell laptop again. Their monitors on the other hand seem to be absolutely awesome, I bought a U2412M recently and it works brilliantly.
Most reviewers gave the 720p model very good ratings. It's very unfortunate that the 1080p model seems to be having issues (see my top level comment).