Dan, I think this is a phenomenal product. I didn't know much about laser cutters and their potential, and you did a great job making this accessible. I wish you luck and hope to see your company grow.
I'm certainly not an expert in many areas (Lasers for one), including many of the areas that these products pop up in, so when something seems too good to be true (or if I happen to have said expertise) the first thing I do is hop over to comments to see what the rest of the community has to say.
I always try to take both links and comments with a grain of salt and a healthy dose of skepticism and try to come to my own conclusions. That's not easy to do if I only get one side of the story and I don't happen to have years of experience in the relevant fields.
A negative comment is one that doesn't contribute anything. A negative generalization about a community that doesn't provide an explanation could be seen as an example of a negative comment.
https://youtu.be/0R3mMUsHFvU?t=13m48s
Also, I don't disagree with your comment, I just hate that the top comment always seems to put a damper on every truly promising launch or product - with Dropbox's launch being a famous example.
As a class of machine, they're just not as easy to use as, say, an inkjet printer. As I said, the camera feature looks nice, and according to danshapiro, they've done a lot to help with the maintenance issues by enclosing the optics.