I finished it yesterday using Saber (lulz easy mode i know
). Might play NG+ using caster
While i had a blast playing it, i really did not enjoy the battle system. Personally, i found the rock-paper-scissors guessing game to be terrible and was easily the worst part of the game.
The storyline while good wasn't what i would call fantastic. (i personally found the bits that weren't focused on the holy grail war a bit hard to follow) The interactions (and conflicts) between each master and servants was easily the best part of the game ( as expected )
One minor issue i had was the repetitiveness of the game. Every week you essentially do the exact same thing (of course there are twists here and there).
Overall its a solid 7-7.5/10 for FSN fans. Else probably a 6 or so.