Concept: very good. 
Mopping: good. Leaves wheel marks on light colored wood flooring. I have to clean the wheels thoroughly to minimize the imprints. 
Cleaning: average  
Chaning mop vs brush: headache 
Self-empty when using mop: not supported. Hopefully this will be fixed in future versions.
AI navigation: Robot feels lost in my home. When mop is attached robot navigates right over the carpet with carpet zone set. Avoids obstacles then gets confused and will skip the entire row randomly.