Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: So far so good
Review: I received a linear polarizer (as described). Seems to be pretty decent quality. I've only been able to take it out once on shooting session. Using a Panasonic GH2 +manual lens it does get a little tricky to see when the polarizer is in action. The LCD/EVF auto gains to present a viewable image so they won't always do the trick. Instead keep track of the exposure value and histogram. Wasn't the best session to really test it (I am also still learning to use it) but it definitely seemed to cut out reflection when I was testing it on some car windshields.
