The technology isn't flawless. A trial only showed that the 670G works for 14-year-olds and older, so you'll have to wait for subsequent tests to see if it's safe for children aged 7 and up. It's demonstrably more effective at maintaining safe blood sugar levels, but it's not so effective that you'll always be in your target range. And of course, this doesn't help with type 2 diabetes, which is far more common -- you're stuck with conventional solutions in that case. Nonetheless, this is a big step toward a day when diabetes is more of a minor nuisance in daily life than a constant presence.