They'll ship with the distro of your choice preinstalled, and I've had wonderful experience with their support (where they suggested a kernel upgrade for me a few versions higher than what was shipping with my preferred distro.) Every model except the UltraLap comes with a mini-screwdriver and encouragement to use it. The UltraLap is their competition with 'ultrabooks' though, so it's not put together as nicely as the others - no screwdriver there:(
They just test everything, and only send you stuff that works.
