Fate/Stay Night is a Type-Moon VN adaptation from 2006, about the Holy Grail Wars, the wars in question being the 5th, thusly providing a story with plenty of revelations throughout the series, providing a richer story than would otherwise have been achieved.
Story - 7.5/10
The Fate/Stay Night story is a above average story, providing enough twists and revelations throughout to keep the viewer engaged for the length of the series. Sadly though, a rather void patch in the middle of the series does detract from the series, not enough the put someone off finishing the series but enough that its noticeable and disappointing.
The ending is also somewhat disappointing. Only a few series should have sad, almost anti-climatic-romance endings like this and this certainly wasn't one of them. The romance is only brought together in the last few episodes and never establishes a good enough atmosphere and back-story to justify such an ending, which is a real shame as a simple happy ending would have maybe been a little cliche but it would have been a fitting ending to the story.
Animation - 8.5/10
For a 5-year old series the animation is of high quality, and would pass if it aired now, even given the vast improvement in animation quality in the past couple of years. There are some points (particulary where the light coming from windows into rooms) that the animation becomes somewhat hazy and unclear, which is disappointing given how the animation for the most part is prety good.
Overall, the soundtrack is great, the op's and ed's are good, although the first op isn't really a fit and feels out of place. The lack of any cheesy moments created by the music is a joy, as too many series tend to use cheesy/cliche music at big moment during a series and it can detract from the overall feeling.
Characters - 7.5/10
A good cast, although some characters aren't developed enough. Sakura and Taiga in particular aren't really developed at all, and given how they make frequent appearances, including one large part in one of the final "arcs", a little more development on these characters would do wonders for the scenes they appear in.
Unfortunately, Shiro is a "save everyone, no matter what" protagonists, which isn't really to my liking, saving Saber and the other cast members isn't the problem, its saving everyone in the whole town that can wear thin as the series progresses.
As a whole, the Fate/Stay Night is an enjoyable series, lacking in a totally solid story,ending and cast, although these points don't devalue the series to an unwatchable mess, they do detract from what would otherwise be a far more highly regarded series.