model M571 is great! We received the M201 as a housewarming gift. While it's an amazing little robot vacuum and I'm very impressed with it, our house is too big to clean in one go. We have carpets in the bedrooms and tile throughout the house. I ordered the M571 because of the remote control, carpet roller brush, floor mopping function and suction power. Benefits: • Offers multiple cleaning modes • Includes remote and app control • Device tells you out loud which mode you've selected • Carpet roller brush • Variable suction power selection • Floor mop head with large water tank • Won't get caught under furniture • Amazing battery life • Ability to schedule via device , remote or app • Automatically marks areas to clean (doesn't save them for next cleaning) • Makes carpets look great • Picks up almost any small object • If an area is missed due to the object, it will move and continue the cleaning line . Then it returns to its original place and continues cleaning • Large dustbin with filters • Low noise level during operation. Cons: • I've noticed that the layout of your floor plan, furniture, and objects can cause the robot to stay in one area until it finds a way out. This lengthens the cleaning process and sometimes it is not possible to clean a part of the house. • Mood Suppressor is only intended for light cleaning, but does what it's supposed to. It will also try to clean the rugs and rugs, so blocking rugs and rooms with rugs is very important.” • Sensors are 95% accurate, but devices, rugs, and mats are the hardest to find. • It moves light objects like coasters. and trash can. Sometimes it collides with objects quite hard, but does not damage or leave any traces. • I've noticed that rough tiles with deep grout lines can interfere with the cleaning pattern, but it always comes back to clean the area. Improvements that make it competitive. Advantage: Application feature to create a map feature with the ability to follow the wall to sketch the house and save the floor plan. Then let the user name different areas of the plan, with the option to delete just that area. A carpet detector in wipe mode would also be great! Overall the M571 is great! Remember that square areas are cleaned fastest and the more furniture, oddly shaped areas and objects determine the user experience, but ultimately he will clean every nook and cranny. I have their base model and their advanced model and both exceeded my expectations for the price. If you think your home is clean, you'll be surprised what these little robots pick up.