I have a 30 x 15 AGP, oval in shape which is at a weekend home, and nobody takes care of the pool during the week.
I leave the pool each Sunday with a mesh cover over it but that doesn't mean small stuff doesn't still get through and fall to the bottom.
My routine when we get there on Friday nights is to pull the mesh cover, throw in the Pool Rover Jr., make sure the liquidator has bleach in it, pour a drink, enjoy the sunset with kids and wife...then go to sleep. I pull it out in the morning when I get up, clean the filter and put it away until the next week.
I am amazed at how wonderfully it works. A few tips: 1) learn how he cord coils and and give it a few wraps in the opposite direction its about to twist before you put it in. It will help as it gets to the end of the cycle. 2) Once you mount a set of wheels to turn in a certain direction, don't change it. This way you wont get confused as to which way the cord will twist. 3) If you have an oval pool, put the Rover in at one end and let it get started going straight and vacuuming the long end first.
With these tips, I assure you, for the money you can pick one of these up for on the net...you cant beat it! BTW-I have zero affiliation, its just that I read mixed reviews when i bought it but because I could return it I decided to give it a try.