Brett Kelly on what he's calls a Kickstarter Potential Backer's Mental Checklist:

"…novelty and excitement have been key elements in my decision to support Kickstarter projects. Neither of these hold up well over time."

He talks about what he calls ‘interest attrition' that takes place between learning of a new project and the day a shipped product is received. In his checklist, he highlights some of the challenges with crowd funded projects from Kickstarter. None of them are insurmountable but it's something to keep in mind when backing something.

But, to me, these are important points for the project organizers themselves. Communication is key. And limiting your production rates is just as important as achieving your minimums.