Utterly dreadful.

It's made for kids, so I wasn't exactly expecting the most amazing story. But it's utterly dreadful. The story is very one-note. The villains are vengeful to all, which makes them utterly uninteresting. Martha sounds very poorly written; she doesn't sound like she usually does.  The artwork is decent enough some of the time, with a very psychedelic appearance. But in other instances, the Doctor and Martha look stilted and lifeless.

It is worth avoiding this one - almost no redeeming features.