Me too. I've decided that there are no new things that I need so much that I can't wait until the thing is actually shipping. In many cases I've been quite happy waiting until a v2 release when the early bugs and quirks are worked out.
Even with huge savings for being "an early backer" - I've found I get more for my money (and sometimes anything for my money) if I wait until an improved "v2" ships a few months after initial release.
This isn't a slight on this project specifically but there is a risk that any project which isn't yet in production won't get that far...
TLDR; during development of the printer, a number of things have changed (including a noticeable reduction in print volume). Refunds were offered August of last year, and the vast majority of refund requests are still pending (and currently half a month behind their own deadline for the latest update.
Not that I have any knowledge on whether the people behind Lily have better or worse communication and management skills, but just because they're happy to offer refunds doesn't mean they'll offer them promptly.
It's still hard to part with my money (even at 50% off) when the ship date is next year though. I've been burned by various kickstarter projects that get delayed ad infinitum.