GOOD THING: This. Just... this.
BAD THING: Nice as the plot is (villains force the TARDIS to restructure itself mid-flight to try and trap The Doctor) we don't really learn a lot about our villains here such as who they are and what motive they have for wanting to catch The Doctor or screwing around with his new companions. This is a minor complaint but I'm just so used to Doctor Who bad guys explaining their plans out-loud to anyone who will listen.
The Final Verdict: An interesting start to what promises to be an interesting "lost" chapter in the history of The Tenth Doctor. The new artist is a definite improvement though the motives of our villains seems ill-defined at this early point.