I'm a new pool owner and have a mountain lake (or mountain pond?) pool shape, with a bench at one of curves between the shallow and deep end, and a stair bench extension by the entrance. I'm concerned about a pool robot missing areas, an am wondering if any particular brands or robots are known to be better at navigating a pool such as this. I have seen some robots that have some pool scanning capability rather than just a random behavior, but I haven't found anything to indicate how effective that scanning ability is.