Hey this robot vacuum is working perfectly,  it even mapped my difficult bedroom level in only one sweep.  My last shark robot could not achieve that.  Please take my advice and splurge in the lifetime warranty, as this vacuum has replaced another shark self emptying robot that died at a year and a half. They were serious about that one year warranty- no replacement options,  no options to fix.  We had to lump that expensive rock and start over.  So far,  so good,  but I'm happy for the extended warranty this time!