I've owned two pair of Serpicos now and I love them. I wouldn't recommend them for the trail as they're a bit fragile (and Smith doesn't provide a hard case!) - but for around town you can't beat 'em. Careful with the arms: if they get loose they'll scratch the lenses.
You can't beat Smiths Polar Brown lens. I have owned three pairs of different smith shades (Vice, Toaster and Serpicos) and the PB lens is stunning. As far as the Serpicos are concerned, best pair of glasses I have ever owned. The slight curve in the frame/lens really makes these suitable for faces of all sizes. Upon breaking my Vices by accident, I sent them back and got these as a replacement (due to the vices being discontinued). Thanks to their killer customer service, I was only out $30 or so out of pocket. I'm in the process of getting the polarized silver..
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