Polarizer with deficiencies in the system

Have the polarizing filter for a long time in use. It does what it should do a polarizer, the price is given that one hereof even a need still acceptable thanks to the Cokin system. Loss in sharpness or the like, I could not tell, as he sees meticulously crafted and makes no impression as if it breaks at the slightest touch - because he can not have, because at least in my product in use with the P Holder a slight effort is needed partly to rotate the filter in the holder. Sometimes you go very easy, other times it seems to be a little bit wedged. But when you consider how much does the whole filter system is allowed but MMN not expect a luxury product. Since you have now times compromising. At the image quality I can not fault it as I said. I have always enjoyed working with the filter system of Cokin.