>>360133214
I have them, they're great. Took them 7 days to ship them, then another 4 days to arrive. Installation is really easy (twist into place, at least on the CV1 - they have guides for each headset), comes with a little holder for them. 
Quality is great, I have the maximum FOV and basically every option available on mine, and it really made a difference toward clarity in VR, so I wouldn't skimp out on FOV options. I don't own any lenses below maximum FOV, but I can tell you that I could tell a very very minor difference in FOV between no lenses, and maximum FOV lenses (for me, it ended up closing the nose gap, too, added side bonus)