This show is compared to the big popular animes underrated. Forget about the couple reviews that complain about the plot or the characters. The artstyle and the level of detail in all animations is by no doubt simply magnificent, especially for its time. The fights are fast paced and with the camera flow from different angles and some slow-mos visually top notch.
The plot is very decent, much improved written than the original, which wasnt bad either. You can almost never foreshadow whats coming next. Due to the core of the story beeing a competion between seven magicians and their (usually) on the front fighting servants over some holy grail, it is not clear who the bad guys are. Despite having some unlikable characters with clear bad intentions they can all be distinguished in what their motivation of winning the grail is (some dont care about it, some have yet to find out or change their mind, some master and servant agree with each other, some dont).
The character build up is fantastic, from having way better introductions than in the original with improved writing and dialogue. Its not the stereotypical anime with the main characters beeing the strongest and winning every fight, they especially at the beginning get their ass beaten up quite frequently, even though you know that there is yet more to come from them. Some characters do surprise you in terms of what their abilities are, with ,what i liked the most, early subtle hints that they might be more dangerous than their appearance suggests, what adds to the writing level.
You definitely will have a great time watching this anime and probably the whole series, if you like.