I thought that the episode was okay. I don't think I'll be able to fully judge it until I see the other episode. I definitely see some old school DW elements in this episode.
A few things I liked: 1. The development of Rory's character- he talks about his family and steps up as a protector for the ganger girl. With the Doctor being a little more aloof this time around I think a Rory that reacts on behalf of the "every man" in these adventures would be great. And the Doctor keeps calling the guy Rory Pond! Ha. 2. The eye ball texture of the ganger's skin was very cool and nice and creepy. 3. The Doctor Ganger! I know we've seen this before, but I thought this rocked. It makes you wonder of the Doctor who was shot during TIA was the Ganger (assuming that a ganger could copy a timelord's regeneration cycle- which I doubt).
Overall, it's an okay beginning but let's see the next part so we can find out if this 2 parter is any good.