I personally own the matrix. I've played with it once and shot it about four times (yeah its like a week old) and i would like to list the pros and cons
Pros: Ultra fast. Granted i do play the piano but i can rip out sixteen a second with this piece of beauty, i'm sure eve the slowest fingers can do ten.
Pretty accurate: It's got the potential to be great... But i'm using the stock barrel. Its still bretty sickly accurate, and when my all american comes its gonna be a dart machine
Highly upgradable: aardvarkdirect.com has enugh upgrades to keep even the most freewilled spender happy for a while
Comfortable: I like the way it feels, i'm thirteen, 5'6 and 115 and i can hold it comfortably, you better be able to.
With right paint, doesn't chop. Period.
No chops even outshooting my hopper.
Cons:
Gas hog, but fixable with new bolt
new reg requires small mod to get up to turney level velocity: unscrew the bottom half of the reg, and place a dime below the spring to create a little more volume. Otherwise it will max out around 260-270
Maintenance a little more than angel, but a lot less than a cocker. Basically you should spend about fifteen minutes ever couple of cases lubing ur bolt.