Really, I can't believe the ratings on IMDb anymore. People must watch one episode of a TV show and then come right over and rate it a 3.
After watching the pilot, I couldn't wait to see what would happen. There is a certain dynamic between the characters that makes the show realistic but also gives you some laughs (or maybe just smiles). And yes, I think the casting is pretty good. Cliff Curtis just has the face of a government agent (let me tell you, I know a few) and the Interpol agent is especially believable (he IS Italian).
As for Ashley Judd, I don't get why people say she is not believable as a mom that kicks butt. Before this show we had Gina Carano taking down men in Haywire so just because Ashley Judd hasn't trained her whole life or been in a similar role doesn't mean she can't do it. The premise of the show is that she was ONE OF THE BEST agents.
After watching 7 episodes, the plot is totally not like Taken. It has expanded a lot more and unlike what other reviewers have said, you can't tell where it's going. I have watched (and am watching) plenty of shows and this one is not stuck in a rut.
So give it a chance! :-)