They have a very slick design and a good battery life, but are well known to mount crappy SSD with a proprietary interface. It seems they not last very long (see comments in the link below), and because of the proprietary interface, a replacement SSD is 2-3 times more expensive than disks with comparable size. Mine died a few weeks ago and I found way more convenient to buy a special adapters to mount a cheaper disk, even if it creates a small bulge at the bottom of the laptop.
I would discourage also the Macbook Pro's because of the fair amount of work that's required to have a reasonable percent of the hardware working fine. In particular, with Linux you would lose one of the main advantages they have that's battery life.
I'm going to buy myself an XPS13 Dev edition, even though I don't think it has the absolute best hardware.