Very efficient on wood Floor. We have 18months children and dark wood floor. There was lots of white strips, fat from food and foot print. Helped a lot to get them clean as before and without rubing on knee. Very easy to use and 20minutes battery is enough to do 1 level 20 x 40 of wood floor. Wireless is easier to use than wired on daily base if needed. Also good on ceramic. If used often and with children an extra sets of pad may be useful.