Review on Smart Programmable Robotic Vacuum Cleaner - Gyro Sensor for Home Navigation, Scheduled Activation & Automatic Charging - Ideal for Carpet and Hardwood Floor Cleaning - PureClean PUCRC105_0 by Amy Wheeler

So, the official rating on this. I've had it for a long time and it works on perfectly flat surfaces. If you have a door carpet or other carpet, the brush will get stuck underneath and will need to be rescued. If you have a lot of furniture with exposed legs or a chair, they will also get stuck. He tries to crawl under the chair. Other than that, it works decently when it's not yelling at you to clean your brush. Now I use it in my basement where there is nothing to glue.