They work pretty well and are in fact polarized (the 90 degree turn test with 2 polarized lenses on top of each other proved this to be true) so they actually do their job to reduce glare and protect your eyes from the sun.
I've found they're just a little tight so I can't wear them fort extended periods of time without starting to get a headache. The arms of the sun glasses are also very stiff in that I need to use both hands to fold the arms in or out, but they're slowly becoming less stiff with more use.