I have it set to run MWF mornings. In the 4 weeks I've had it, it's I my run four of those times. Most of the time, it says it can't run because the water tank is low, but I fill it every MWF morning, so that's not the case. It does work pretty well when I start it myself (although it leaves streaks - even on the lowest amount of water), but I bought it so it would run while we were out. I had the small iRobot mop and LOVED it - no streaks but also not programmable, but it stopped working, which is why I bought this one. This one would be great if it would just run as scheduled!