It does what it is intended: it washes the ground! (Tested on tiles)! beware, if you are very fussy it should not because it can sometimes leave traces (but manic make their household themselves right?). I am very satisfied by cons I find it very effective over a 20m2 surface of more than 40m2 (where there remains less well washed locations). So we wash our living room in 2 times (it is approx 40m2) with the virtual wall and it's great! It sucks the fine dust particles but it is not a vacuum cleaner! Roomba vacuum cleaner or are imperative before! I highly recommend!
