[deepbreath]

Haven't heard of it before, but they look decent. I think the price difference with brand laptops becomes less impressive if you go for the higher specs and also want it shipped internationally (20% UK VAT).

The base weight for their portable 14.1" one is 1.6kg, but switching from i3 to i7, adding more RAM and choosing a bigger SSD would probably bring it closer to 2kg (compared to ~1.2kg on the x1).

I think the x1 does things like soldering the RAM to the motherboard, which makes upgrading hard, but also makes it really thin (1.5cm compared to 2.2cm for the System76 one).

Since the number of possible configurations on a build your own is quite high, I imagine it's more likely that you'll run into issues on getting everything to work on Linux.