I bought these after being tired of replacing high end Oakleys either through losing them or scratching them.  The thing I did like about Oakleys was that you could replace the lense or the side piece etc individually which saved money.  Then I discovered Tifosi at a running store and I really became interested in them.  Yes I did lose a pair so I bought two more--one for back up.  Oakleys run about $200+ and quite frankly are stiffer and heavier than these.  They wrap around and are adjustable for activities and are very light.  I did read the nose piece issue and did experience that but was able to replace it with my back up pair all at a much less cost than the Oakleys.  The optics are fine but the lense materials is a little suspect--not bad but that is where Oakleys would win hands down.  But again, if they get scratched, the replacement lenses are a fraction of the cost so really it is a moot point.