I'm intrigued by the Singapore Duck tour, too.

When we arrive Friday night just after 6PM, will we be able to book the SIN free shuttle tour of Singapore? Ideally we'd book for the next day, so we get back to SIN itself and take the tour before our afternoon flight.

I searched this thread - there is mention of shuttles from the hotels to the malls.
Has anyone found any great outlet malls? We may leave the shopping until KL - unless the offer in Singapore is too good to refuse.