I just looked up the scottoiler. Wow, $300 for something I have to add to my handlebars, plus a reservoir somewhere else on my bike? And I have to buy their oil?
Maintaining a chain isn't all that hard. I think the center stands for our bikes are around $300, and a bike lift from Sears is $100. So you put it up, brush the chain, oil, drop it down and adjust.
And there is one less gadget to adjust or deal with.