Vacuum suction power is phenomenal along with the dual sweepers. The major reason for the drop in starts is the lack of map saving and memorization. The lack of save maps disables the ability to define no-go zones, identify rooms which cripples the schedule feature. You can’t schedule individual room cleaning preferences and the vacuum repeats cleaning over areas previously cleaned extending clean times beyond what the battery can handle. I can’t recommend this model and advise stick to their LDS capable models e.g L, T, and Q series.