This anime is great, despite the main character and his stupid eye brows and ideals of "protecting everything". Plus, the annoying thing is that they show the same flashbacks a few times through out the show and the protagonist always talks about protectiong stuff.
The story is confusing at first, but at the end everything comes together. Its basicly about 7 masters who kill each other with servants/magic, and the last one standing obtains the Holy Grail. And a weir browed looking kid who falls in love with his servant. Blah Blah.
Overall this anime is enjoyable. Just ignore those fucking eyebrows T_T.