I just used my Giraud,and actually timed myself.I averaged 14 cases per minute for the whole session.A couple of times,I had 15 or 16 per minute,then I would fumble or let my grip slip and drop back a few.I'm right handed,so I pile my cases on the left side.I pick one up with the left hand and pass it to the right hand which puts it in the trimmer,while the left hand picks up another.It keeps you kinda busy,but you're through before you know it.And its accurate to about .001,which is plenty good enough. Lightman