I've had an iRobot Roomba for years and have used it with the only virtual wall it came with. To prevent the device from getting into other rooms, I used furniture or whatever I had on hand to block the path. I finally found a virtual wall for a reasonable price and decided to buy it to make my life easier - plus it's time to invest a little more in the vacuum that has helped me so much over the years. The delivery was fast and the product works well, no problems.