This is the best marker I've ever used! Awesome trigger pull, the feel of the perfect construction is just...awesome! There is no way to describe how well it is made, other then to hold one! This thing is also intimidating. It's loud, fast, and just looks dang cool. HIGHLY accurate too. What I consider the best semi-auto on the market. QUITE COOL! WILL get some looks and questions out at the field, garunteed!
Umm....if you are HUGE wuss you might think it's a little heavy. Probably not styled for a speedball game, and speedball players would tend to be those kind of people who would complain about how heavy it is ;) REALLY needs a motorized hopper to keep up w/ the fast rate of fire, not to mention its sooo stable when you shoot it doesn't move AT ALL. This is a GREAT thing and really contributes to accuracy, but you do need a hopper!
No upgrades are really necessary - ever. Parts are readily available, and there will always be custom shops to do whatever you want on it.