Simply great!
These lens cloths have proven to be a real winner.  I've had mine for months, and the only reason I've retired my first one is that I figured I should give another design a chance to wander around with me.  The first one got an occasional soak to remove the accumulated grime (my glasses take a lot of spatter from saute pans when I'm cooking), and has continued to perform quite well, with no noticeable loss in performance or fading.  That being said, I'm down to just three of the original five, because my wife and my mother have each stolen their favorite designs out of my set.  You may want to consider doubling up on your purchase, if you wish to avoid my fate.
Rating: 5 stars