As a techno geek with both a robot and a SWC, I'd side with Carl (even though I don't really see an argument here) that the Robot saves MASSIVE amounts of time and labor vs. the pouring bleach/SWC debate.

Labor and time aside, my Dolphin polishes the water to a quality far beyond what my sand filter with DE does. Conversley, Cl is Cl is Cl, so bleach vs. SWC doesn't show a step change difference in sanitation effectivness (efficiency, yes).

As everyone has already stated, if it makes sense for you, go for it!