I have shot one for an extended period. I am intensely satisfied with the tech advances Jack and team put into the CS1.
A marker that finally runs off the same batteries as hoppers. The battery read out on the board while the marker is cycling and not static. Simply great.
I'd love to watch the machining process for the air thru frame the routing through the trigger guard and keeping the same size reg piston is awesome.
Also they shoots pretty sweet as well :P