CT RollNLock

Hi, has anyone used one for top rope soloing? Or know how much drag it produces when you slide it up a rope compared with a micro-traxion?
Thanks.

I´ve got one but haven´t got a micro-traxion so no comparison there I´m afraid. 2m of rope below is enough to feed so less drag than a shunt. As it self-feeds the amount of drag I don´t find relevant anyway since it´s only training!