This is a very good device for easy cleaning of the tiles in a nice way. It is efficient and did a good job although there are two black dots. The first being that it would be good to have the second squeegee slightly less wide than the existing one. The high is ideal for large windows but the small is too wide for some small tiles. This requires, for a few millimeters, horizontal use really not adequate. The second being quaprès a passage, there are still traces made by the rubber squeegee. But this does not affect product quality.