Some people mistake the concept of animation with the concept of moving picture. I was really surprised when I started watching this and realized, it wasn't really an animated show, but more drawing that moves every once in a while. The animation is stiff and poor. The character barely moves and instead of actually seeing them take a step forward, the camera shift, showing you another background and them ZAP! The Doctor and Martha are on a different background but they still hasn't moved. An animated cartoon is not a character that stand for 2:21 minute moving is eyebrows every once in a while until the action magically transports him somewhere else...where he is free to move his eyebrows...again.
That being said, the story is, as far as it goes, a pretty standard Doctor Who episodes. Although it could have easily been split into several different 30 minute episode, which could have ease the flow of the action and given us a better perspective of what was at stake. There is so much material in there it could have been it's own animated series. Instead we have a 45 minute episode that tries too hard to impress. It all feels too compressed, as if they tried to fit too much information in too little time. It never really achieve the scale of 'grandeur' it wanted to.
The voice acting is solid and is definetely the only reason you want to finish watching it. David Tennant and Freema Ageyman gives a solid performance as their respective character and even the vilain balthazar (Voiced by Anthony Head) is great.
Would I recommend it? I guess I would, if you are die-hard fan of Doctor who and wish to complete your collection. But it is a low budget animation project that is an insult to those that love animation shows. Keep it in mind