I bought these as a present for myself for fathers day. Lets start by saying that I have a big round head. So most shades squeezed across my temples or looked a bit small on my face. Other problem was that I was never happy with the coverage of the lenses. You either got sun above, or below. I like the classic aviator frame, and didn't care for any of Oakleys offerings. Their prizm lenses were very expensive and the gauge 6 and gauge 8 models looked cheap.So I decided to try these with Smith's chromapop which is similar to oakley's prizm. The Smith's are a prefect fit. They stay put no matter what. I use these as casual/driving glasses. I love the chromapop effect on a sunny day. However it can be a little much on a heavily overcast day, but on those occassions, I probably dont need the sunglasses... The larger lenses provide great coverage and look good on my big round head.Only gripe is that they didn't come with a case, but thats not hardly a deal breaker. I returned a pair of oakley gauge 6 after purchasing these glasses, so the $100 that I saved will buy me a case :)I like these enough that I'm tempted to buy a second pair as a backup....