It's pretty good right out of the box.
You could buy it and go play the next day.
But if you really want to upgrade it, you might want to get a new regulator and a better board. (Even though the LEAP Tado is amazing)
Strengths:
Light
Accurate
Low-Profile
Pretty fast (25 BPS)
3-Point adjustable trigger
Easy maintenance
Price
Weaknesses:
None that I have encountered.
Review:
Ok, so I bought this marker after coming back from not playing for a while. I wanted a gun that would keep up with some of the newer released guns. And let me tell you, I am not disappointed in the least. From the moment I took it out of the box I was happy. And when I took this bad boy out for the first time, I went from happy to amazed. It definitely out-shot my previously owned Ion XE, and for the price of it, it isn't far behind a Dangerous Power G3 (or some other mid-grade marker). In the right hands, this gun can lay down paint like a mo-fo.
Anyone who wants an amazing gun and does not want to spend a whole lot of money on a marker, I highly recommend this. Great buy for recreational players.
It is fast, light,accurate, and sexy.
Conclusion:
Buy it.
You won't be disappointed.
Unless, however, you manage to find some way to break it. Even then, Kingmans tech group is pretty efficient.