I've tried out most of the SCS lubes and this is the one I keep going back to. I run it in almost everything including Gans, Moyus, Yuxins, Dayans, X-Mans, QiYis, YJs, and on.
Lunar has the perfect balance of speed but stays where i need it and lasts quite while. (As opposed to stardust which OMG is fast, but is too runny and goes away very quickly.) I also like martian, but not nearly as much as lunar, which i keep coming back to.
The picture is my ranking of the SCS lubes from best on the left (Lunar) to my least favorite on the right (cosmos). I used them on a bunch of Little Magic cubes to do a lube comparison for this review.