I just got my white doubleshots today and they're pretty great. While the font is a bit gaudy (the font used on older Corsair boards would've been better for me), the feel, sound and look (again, minus font) are otherwise amazing. I'm glad this was done in the first place. Also, on the white caps, the light bleed is managed perfectly--that is, there is none. The light only shines through the legend, unlike on the white Vortex set, where there is some light bleed.
One thing to note: When removing the keycaps from the holder, you might notice some black residue on the edges of some of the keys. This can be wiped off pretty easily (at least, for me it was easy). It's only really an issue for those of you getting the white caps, as you'd barely be able to see it (if at all) on the black caps.
TL;DR, they're great!