bought this with a 20oz tank for about $40 dollars. It was cheap to buy but worked very well on my spyder. i could tell the balls didn't dip towards the end and went a lot straighter
Weaknesses:
the regulator moves itself depending on pressure, but you have to move it when the temperature changes.
Conclusion:
for this low price i would get it for any gun that doesn't have a regulator already on it. shoots acuurate, and not that complicated. id give a 10 because it works well on my spyder