Got my robot in 2019 worked like a dream for years. Loved it cleaned each room as instructed, never disconnected from the wifi went home when it was low on battery, pinged me when maintenance was needed and the voice, it was perfect and the voice was pretty much fluent and soothing. Update comes in late 2021, robot is ramming into everything, getting stuck on nothing, getting lost despite no obstacles, quitting for no reason in one room trying to climb up my chair. removing all the voices, there used to be 8 english, 6 chinese voices, 3 japanese, 4 Spanish, and so much more. Now there’s only one botched english voice that’s gargled and cant even say “cleaning” correctly other voices include only one Spanish option and 9 stupid Chinese versions. My last complaint is why I need a password and account for a vacuum. I only expect it to clean the floor semi decently, and only just recently got over the fact of the stupidity of needing wifi, I wish I could downgrade firmware. Way to ruin something nearly perfect I would give negative stars if i could