Here is the only picture I have of my Matrix.

The completed and painted Matrix standing in our apartment.

Your average High Power rocket is built with an airframe of Phenolic or Cardboard. Cardboard can be a bit soft, particularly in wet climates, so given a choice - especially for larger rockets - I prefer Phenolic. It's stiff, fairly tough albeit somewhat brittle (depending on type) and pretty light weight for its size. The "problem" with Phenolic is that it is made from spiral wraps of material, and this leaves a spiral groove running down the outside of the airframe. It's not enough to be a structural or aerodynamic problem, but it does affect the look of the rocket. Some people like their rockets to be extra pretty, and I guess I can understand that; I like mine to look nice too, although I care more about performance. (Actually, to me, if it looks good from 20 feet away, I'm OK with it. Crawl up close to one of my rockets and you can usually find problems with the paint job.)

Quantum Tube "fixes" the problem; it's essentially a piece of PVC plastic. Very smooth, which makes for a very easy, very polished paint finish. Which is a good thing, if that's what you're after - but PVC is not what anyone would call "light for its size". The Matrix weighs almost a pound more than the Horizon despite being several inches shorter and the same diameter.

I like the overall looks of this rocket, with the forward fins (purely cosmetic, they don't make a difference to the flight performance) and the thin G10 fiberglass fins. But the airframe makes this rocket too heavy for me to be happy with it, and as a result it's never flown. Someday I may fly it just to see how it goes, but for the time being this is definitely a secondary rocket.