If you've been waiting for an invite to Google's Project Fi, now might be a good time to check your inbox. We've gotten invites. And a number of you have let us know what you're getting invites.

Now for the tougher question — do you take the plunge for Fi? (And, for that matter, what the hell is Project Fi?)

Fortunately for you, we've been using Project Fi for a number of weeks now, and we can help walk you through it.