HPA, Screwin, yes or no?

[theomacy]

are they just simpler or is there more to them that i dont know about. i'm looking and i need feedback.

[Halliday]

They are about as simple as using a CO2 screw-in tank. Filling them is even easier than CO2 b/c you don't have to weigh them. Just watch the fill guage.

I like my Crossfire 68/3000 metal stub. Simple and works great.