Stacking discounts! Kohls has the iRobot Roomba i3+ EVO (3550) Self-Emptying Robot Vacuum for $400 - 15% off with coupon code CATCH15OFF [Exp 4/11] - 10% off with coupon code HOME10 [Exp 3/19] = $306 with free shipping. Also includes $60 in Kohl's Cash (Use March 20 - April 8).

Has the 10x the power-lifting suction compared to the Roomba 600 series.