If you have a pool of any size, an auto cleaner is set-and-forget. Vacuuming is generally hard, sweaty work, so we let a machine do it. Maybe you can do it faster, maybe not. The machine doesn't get sweaty.

The robotics (Aquabot, Dolphin, DirtDevil, Blue Diamond, etc.) climb and brush the walls. I haven't brushed my pool's walls in 3 years--the robot does it.