I'm using this thing to leveling my OverLord bed. Less than 10 minutes with 0.3mm layer height or less than 20 minutes with 0.15mm layer height. Helps me to easily adjust the three screws of the bed (my bed differs a little from the middle to the edges) as well as see speed, temperature, extruder percentage and other possible problems or adjustments if I use a new, unknown filament.