There hav been a couple of people on their forum who are ticked that they've missed their ship deadline by a couple of months. Some have even asked for refunds because of that. However, one thing I learned a long time ago is that when you are innovating and creating an entirely new product, nothing goes according to plan and schedule. But I have supported a fair number of kickstarters, and pretty much none of them have shipped on the promised date. There are ALWAYS hidden snags and delays. But these guys seem committed to producing a quality product and to get it right. I don't mind giving them a few extra months.
In actuality, they aren't doing too bad. I believe my unit was supposed to ship sometime in January, and according to the shipper's survey, it should get here in March. As kickstarters go, two to three months behind schedule is actually really good! And, they've been very communicative and given updates quite often, which is also ahead of the curve. I've supported some projects that were six months to a year behind with only a couple updates in that entire time - I still got the product eventually (so far I haven't been stiffed on a Kickstarter yet). Definitely looking forward to getting mine - hopefully next month!