Okay, it's not the best show in the world. It's not even close to being the best show on this summer.
But for anyone out there whose main complaint is that it's not believable because the kids are too different and look nothing like their parents, all I can say is that if you're looking for realism, maybe you need to start watching the History Channel. No one watches a Fox sitcom so they can turn it off afterwards and think, "Well, that was realistic. Very satisfying in its ability to be not at all off-the-wall." Well, it turns out maybe they do.
The show itself needs some work. The jokes are often too obvious, and sometimes "goofy" fails to equal "funny". But it's reasonably addictive, and, overall, a good way to spend a half-hour without having to think or really do anything except just enjoy the simplicity of it all. And maybe it'll get more clever this fall.