After going through 3 Roomba robotic vacuums (fortunately all replace for free), I’ve switched over to the Neato robotic vacuum.  It’s a bit more automated, with the Roomba I had to position “virtual walls” and then divide the cleaning into multiple battery charging sessions.  With the Neato, I just let it run and it’ll figure out the layout, recharge itself, and then resume again when its battery is recharged.  It does have its drawback, it gets stuck more often between furniture, stair overhangs, and floor grids than the Roomba.