Using my filco, this is pretty much my daily keyboard. I give the vortex case a 8.5 out of 10, it has some flaws but nothing that wasn't a big problem.
Mini review because why not:
The only cons were I needed to remove the plastic LED standoffs and just straight solder the leds to get the top piece to fit, there is some very slight signs of CNC milling near the esc key and a tiny inconsistency in the anodizing near the spacebar(both of which are only visible from under 3 inches away I would say). Design wise I think its great, the stock angle without the feet is perfect for me, only downside to their design is the somewhat large gap between the top on bottom case but it doesn't bother me one bit.
Overall it's great, if I was okay with a grey color I would probably just bought a KMAC but the thought (and cost) of getting a KMAC and then hunting down a place to reanodize it blue wasn't the most fun sounding thing to me.