I recieved Polar Pro set of filters for X5 just today and I`m quite pleased by the set. All filters look very well built and CP filters have very precise, smooth rotation and all are super light. They are shipped with GREAT filter case and 6 small filter pouches, if you don`t want to use a case for some reason. The price you need to pay for their lightness is that the glass itself is ON the of the metal rim and therefore is not protected. It`s very easy to chip the edge or make smudges on them - they are VERY, VERY FINE. They don`t seem to have any anti-dirt coating as my biger Hoya filters, but it`s understandable in this price. Still you`ll need very clean and fine cloht to clean them. Can`t tell much about the quality of the glass yet, but they seem good to me so far.