So what was the one big negative? To be honest, it's the resolution. While the screen is probably near retina (the Nexus 7 seems it would be roughly the same pixel size and is 216 PPI) the lenses means the screen gets magnified, in some areas quite a lot.
So it's very easy to see the individual pixels. It looks like you're viewing the world through a screen door. And I'm sorry to say that's quite distracting.