Just received my 2018 Cooper CX from Lynskey, and while this isn't as dedicated a gravel bike as the GR260 or Pro GR, it's still in the same realm.
I took advantage of an amazing sale price they had on it in late January. The spec I ordered has a Pro GR carbon fork, allowing up to 45mm wide tires (came with 40mm).
Anyway, I examined the frame pretty closely, and the welds are perfect stack-of-dimes all the way round. No boogers or gaps. Alignment is perfect. The standard matte, bead blasted finish looks great in the sunlight. Bike rides super smooth and straight, if a bit twitchier than the flat bar mountain bike to which I've grown accustomed. I've put about 100 miles on it in the nearly two weeks since I received it, and I'm very happy with it!