works well. The extension is useful but a little intrusive when you use it. When inserting into the charger, be careful not to press the waste compartment release button. The filter is easy to remove and clean, dries quickly. In general we are very happy with them. Returned in 2021 to edit and downgrade stars - wouldn't buy this again. The basket's reset button is pressed too many times when trying to install it on the charger. This is a very annoying design flaw. I do not recommend buying it.