I've been using the jet m6 polisher for the past month and have not noticed any issues with it. It is practical to use and cleans up easily. It also operates quietly. I run it through the iRobot Home app on my phone every day or every other day. It's easy; all you have to do is press one button, and the robot will begin to clean. Water needs to be added on a regular basis, typically when he enters another room. The floors are quite clean after being washed by a robot; I didn't have to do any cleaning myself.