I took a chance on these as I needed a pair of sunglasses for traveling in England. They look great, not too big but with enough coverage and I look oh-so-hot in my boyfriend's two-seater.
However, they do not stand very well technically. They stems do not have much curve to catch on your ears so they kept on sliding down my nose during a hike, which proved too aggravating and eventually gave me a headache from my ears straining to keep them in place.
Another annoying thing is probably just my anatomical oddity having a fairly wide head, but they do not fit over my head while resting them so I have to either take them off or carry them.
The grading of the shade is great for driving and sitting at a cafe looking glamorous like Audrey Hepburn. Overall, the quality and the look is superb, and great for kicking about town, but if you're looking for a technical pair, these may not be the right ones.

I really like the look of these glasses; they're super cute! However, they are very heavy. I ended up returning them, because, as other reviewers mentioned, they slid off of my head if I tried to rest them on top, and they give me a headache when they are worn normally. I tried to convince myself that I could wear them, but in the end, it wasn't worth the hassle. :(

These glasses look great and have good coverage, but I think they run a little wide. Compared to my sliders, they slip a lot more. At least they look good.