The flexi-edge mop is overall good as it allows you to access many difficult areas, and overall grabs most dust. However, it doesn't grab all particles on the floor and the mop head has a tendency to flip upside down while dust mopping. In all fairness I believe the type of floor plays an important role in the mop's ability to grab unwanted floor desirables. 
Overall, I love majority of the E-Cloth products!