So... this isn't meant to be a full blown review, so I hope it's ok to put here.
What can I say? I'm impressed. It feels sturdier and better than my Filco, in terms of the chassis. The spacebar is better than my Filco's as well. The difference doesn't seem as big on video, but in person, it's a big difference: the Ducky spacebar feels more even, smooth, and sturdy. Although, I'll agree it doesn't have quite the "snap" and quickness as the Filco spacebar.
As far as the Nature White switches go... first impressions are, wow, these are more stiff than I thought. Of course, I knew they'd be stiffer than Red switches (which have the same stiffness as Browns, right? Which is the type of switch I have on my Filco), but I didn't think it'd be this big of a difference. Coming from MX Browns, I'm liking linear switches much more - Browns just felt unrefined and too "scratchy" for me. Time will tell if I'm ok with this switch's resistance - it's not terribly stiff, yet it's not super light like MX Browns/Reds either. I feel like this has the perfect amount of resistance to prevent accidental key presses in games, though - but I've never had issues with that on my MX Brown board.
All in all, REALLY happy with this board so far. The board construction and fit just feels incredibly nice - overall better than my Filco. The spacebar, which was really my biggest gripe on the Filco, is definitely better on the Ducky as well.