DOES NOT BUILD A MAP, which means that it is difficult to limit the areas for diversion and cleans as a result of this is not optimal, and the BATTERY IS SMALL - not enough even to clean an apartment that is 42 meters long and full of furniture. And because he does not construct a map, he is unable to continue cleaning after he has finished charging. partial cleaning spiral - straight lines will not capture if it is turned on near the wall (at the entry, say); therefore, all of the dirt is left, rendering this feature ineffective in this model. At my house, we have a vacuum mop that does an excellent job of cleaning. The material is not shiny and has a porous texture. As on mine, it doesn't look very well. My grandma lives in a smaller apartment, so I thought it would be best to get her a vacuum cleaner with a smaller battery to match, but oh well. I got it for her as a gift. And this is a situation like that. It's a pity (especially because it's such a generous gift!