The CPL an excellent filter I love just being able to pop off the filter, the image quality is great with the filter, the lens cap on it holds well but I is impossible to take off if you have your lens hood on as the cap has no grip to it, however I found a fix by sticking a popsocket to it and now it works excellently (still have to remove hood to adjust the cpl, but now I have a way to quickly remove cap and shoot)The Nd1000/PL is also excellent.The LiPO filter is poor quality and adds a lot of grain to imagesThese filters are very sturdy, I have dropped my CPL filter onto rocks and concrete and it is still in perfect condition, did not break at all and no scratches on the glass, just some scratches on the metal ring around it but that's all.