Yan, who says he's relentlessly on iRobot's heels, points out that Roomba has sold 2.5 million units worldwide; this is in contrast to 200,000 V-Bot vacuums sold, merely 10 % of iRobot's sales.
自稱「一路追著 iRobot 跑」的燕成祥指出，「倫巴」在全球賣出 250 萬台，「趴趴走」20 萬台，只是 iRobot 的十二分之一。