I first bought the brown polarized sunglasses (from a land-based shop), and was amazed by the quality of the lens. I spent one whole day with the glasses - on the road in the morning, and then 4-5 hours in the sea in the afternoon with changing weather from bright sun to slightly cloudy. I had no eye tension whatsoever. The only down side of it was that the brown lens was changing the colors too much for my preference and habit (I have always worn gray/green lens before). So in the end I decided to return the brown ones, and order the green polarized lens (this time from Amazon as the price was $80 less, nearly 50%). Now I am  wearing the green ones, and I am quite happy with them as they change the colors much less, but simply make them slightly darker and richer. They hide reflections very well and I don't have to strain my eyes. I have to admit though that the brown lens was working better, particularly in sunny to shady area transition - somehow they made environment less sharp and very easy to the eye. The green ones don't do so well in this case, but they are fine when you are on the road and they reduce reflections and bright light just fine. But if I didn't have that problem with the changed colors, I would have definitely gone for the brown lens.
In regard to other models of sunglasses out there, I really love these, as they don't stick out of my face, and also fit well to a wide nose bridge.