I've mostly backed creative projects (films/books) and they've all delivered or are making progress towards delivery, with one notable exception. They mostly run behind, but having worked on more than a couple low-budget film projects myself I fully expected that. It's just how it works.

One film project completely halted when a big studio started sniffing around it. Not happy about that one, honestly, but I guess it's good for the people involved. I half-expect nothing will come of the studio interest and then the guy's burned all his bridges on both ends, but I see how he got to the decision he made.

I've also backed some large game projects which haven't yet reached their scheduled delivery dates, so we'll see how they go.