I strongly recommend you do NOT swim when the robot is working! I never do it, I never allow anyone to do it in MY pool!

Pools are dangerous--we forget that as we talk about cleaning and building and chemistry--Ben's point is: By FAR the most dangerous chemical in our pool is the WATER! One slip--the robot catches your toe, while you are underwater, you come up, and your head is inside a loop of the cable, etc....Unlikely? Sure! So is being struck by lightning. Impossible? No WAY! Too many people drown in backyard pools every year and people are killed by lightning every year too.

I cannot recommend a needlessly risky behavior that is easily avoided.