I don't think Ben 10:Ultimate Alien is quite as good as Ben 10:Alien Force, which in my opinion is superb and outdid its predecessor, which I also liked. That said, I wasn't expecting much and I got more than I expected in a good way. Ultimate Alien is not a bad show at all, in fact as I have said already it is pretty darn good.
The stories are perhaps not quite as clever as they are in Alien Force, but they are very well-constructed and interesting. I also love the animation, the colours are bold, with some nice backgrounds and quite unique character designs. The music is also funky and cool, with a good theme tune, and the pacing of the episodes I have little to no problem with either. The romance is sweet, the fight sequences are well-choreographed with moments of eye-popping animation and the moral lessons are intriguing and don't preach.
The writing is really quite good as well, it doesn't fall into the trap of being childish but it does have its funny, thoughtful and endearing moments. The characters are very likable, not just Ben but even the villains maintain interest, and the voice acting like Alien Force is consistent and suitably dynamic.
Overall, not a bad series at all, if there are any illogical elements to it so much compensates. 9/10 Bethany Cox