I've heard people dump on Warby Parker for being cheaply made, but honestly their stuff doesn't seem any worse then what my insurance covered at my optometrist.
Also as a side note, my first pair from Warby Parker had the lenses go bad (they looked like they had dried water blotches on them, but it would never wash out. I assume some coating went bad) and they sent me a new pair for free. That was maybe 2 years ago and I still use the pair.