I was very surprised with this filter kit. The glass seems to be great quality, they both came in their own lens cases and lanyard strap, and a couple of bonus cleaning cloths. As far as the results, absolutely brilliant! I was a little skeptical to be honest since I had a cheaper polarizing lens and it just made the pictures blurry since it was inferior glass. This filter not only got rid of my reflections in the car and made the photos perfect, but the pictures were as clear as if I didn't have a filter on. I literally could see my entire body and camera in the reflection of the car and I put this filter on, turned it a little to adjust and voila, I disappeared like magic. This is better than editing in Photoshop, in my opinion, so this is a real world scenario filter I will definitely be using a lot.
As far as the clear UV filter, I'm not sure how much i'll be using that since I cap my lens often and don't shoot in dusty places but....if i run into a scenario like that, I wouldn't hesitate to. Both filters have great glass and don't seem to introduce any warping or distortion in my pictures. I've invested a lot of money in my L lenses and want to protect them as much as possible so getting a high quality filter is important or else there is no point in having good glass in your lens. I think this filter kit is a good compromise since I get protection and don't see any degrading effects. Keep in mind, they are not labeled but i didn't warrant that to lose a star. A sharpie or a piece of masking tape on the case can fix that. If you are looking for a polarizing filter, this one is giving me amazing results and has made taking pictures a lot more fun! I didn't know i needed it until I had one.