Very well to get rid of weekly chores, but regrets that it has no water reserve and its ability does not cover my 80 m² one must hand it to recharge to finish the apartment and quickly dry cloth ( good! I tip the water sprayed on the ground to maintain the damp cloth), I do have mixed the water with a polish product, and am satisfied with the result, the soil is nickel and shining. In fast mode not seen any difference in terms of speed or I misunderstood? The buffer with water tank option: not to find Braava 320 model. I believe that if it again I would rather take the model 380.