completely agree with asA. My boss is actually part of their pro team and he loves the machine... for shading. For lining there just isn't enough needle hang to line efficiently. I haven't used the machine personally (held it and tested some carts through it) but until the stroke length can be furthered its a pass for me aswell. Also I don't know if it's just me but if it's a pen type rotary I almost prefer a little bit more diameter to it. In my hands it just felt almost too skinny if that makes sense, probably more of a personal preference than anything. That being said, my boss said that lining was the only thing really playing against it. I'm new to carts but am perfectly content with my Edge X and RPG Click.