don't know if you are looking at a robotic cleaner...anyway...I've had em all. suction line cleaner, then a kleen machine, then a i-robot, and then a pool rover jr, which I just sold. My pool is 33ft round..and I pretty much hated all of them...they all worked OK, but didn't get it as clean as I wanted...so I'd still have to hand vacuum my pool....UNTIL....I bought a Dolphin Diagnostic! Holy Smokes you get what you pay for rule goes for pool cleaners. This thing picks up EVERYTHING. from sand, to sticks, to leaves, twigs, pine needles, fine silt caught in liner creases or seams...and also climbs the pool wall to the water line.
I LOVE IT, and would never get another cleaner. I highly recommend the Dolphin Diagnostic!! (no I don't now work for them, nor have any affiliation, other than a very happy customer!)