This series is so much better than Fate Zero which in itself was so good. The servants are stronger, the masters are stronger, there is betrayal, an amazing identity reveal which changes the whole plot of the show and the battles are amazing to watch, not to mention the amazing animation. I would recommend anyone to watch this before watching Fate Zero even though chronologically its better to watch Fate Zero because if you watch UBW first, you would appreciate Fate Zero even more. The characters are amazing, everything is just amazing