I am a very amateur hobby woodworker, and purchased the galaxy sanding discs based on their appearance - I thought they were mesh discs, when very clearly, by both their description AND their price point, they weren't. They do last longer than the traditional sandpaper discs, but I have become very used to using the mesh discs and so they are not in the same category.
Mirka Abranet Ace 150mm/6" Ceramic Discs - 50 Pack
My drum sander was becoming one of my least used machines in the workshop, as the traditional sandpaper clogs and burnishes so easily, negatively affecting the finish and requiring hand sanding or super frequent paper changes. The Mirka roll is fantastic, it chews through hardwoods and even when fillers/adhesives are present it barely clogs. Highly recommend.
The best hand sander I have ever used, very comfortable in the hand, very flat and plenty of holes for vacuum dust removal.