WHAT COULD BE THE BENEFIT ABOUT A VACUUM POOL CLEANER?

A friend of mine bought a robotic vacuum cleaner as a gag. It's actually pretty fun to watch it semi randomly roaming around the room. It seems to have about 15 different direction change sequences, which allow it to eventually cover about 98% of a small area before the battery runs out.As most reviews say, "You can't go wrong with a Polaris." One