Updating to 'Great'. I've changed my position for two reasons: - It was explained to me that the real time map is to allow the user to see what has and has not been cleaned in the house. To actively map the house and save results will require additional hardware not available on the M210 Pro. Reasonable. - A recent SW update has enhanced the vacuum performance improving it's ability to find the charging station and providing uniform cleaning coverage.In my re-assessment, the M210P is a great value and a good 'entry level' cleaner for my needs.This product is so close to 'good'. Works (almost) perfectly for what I need - hard floors, addresses lots of pet hair, long battery life. But the core problem is the navigation and mapping. The vacuum 'maps' the house as it cleans but doesn't save the map and doesn't learn. The robot doesn't 'remember' the house layout, it doesn't 'remember' where the charging station is, it doesn't 'remember' exclusion zones. Every time you initiate the cleaning, it starts from scratch, doesn't know what has and has not been cleaned, and to watch it try to stumble and fumble in trying to find the charging station is almost sad. While I don't know the technical aspects of navigation, it seems as if a software update could make this a great product.