I bought them mainly to observe Mars at maximum approach , so my experience is limited to the red and orange filters. They were very helpful for this application. While the red filter gave the biggest contrast boost, I used the orange filter more often because it boosted the contrast and made it easier to highlight the tiny polar cap. My only minor gripe is that the packaging, while solid, isn't secure, not particularly helpful, you can put a piece of white paper in each box so you can see the color of the filter without having to take it out of the box.
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