I purchased this product because of previous Shark products.  I could not decide between the Irobot/Roomba or Shark IQ Robot.  Decided on the Shark because of the 90 day return policy.  The sweeper arrived in a few days, I pluged in the docking station, set the IQ Robot on this station and turned it on.  After installing the app on my Iphone I pressed start.  It took off, cleaned the entire house, returned to the docking station twice to empty the dust bin and then returned to the docking station and recharged.  No problems encountered.  I have had the Shark for three weeks now, the house has been completely mapped and I am so pleased on the way it cleans the floors.  I am amazed with the technology, quality and performance of the IQ robot.  My cats have finaly excepted the device and they watch it for hours.  I recommend this product.  Thanks Shark!