I'm a month late, but I finally finished it. These characters are amazingly fun to watch, and I had a lot of fun finally seeing these awesome abilities and personalities come to life.
I'll give the show an 8/10. Like Ohiotaku said earlier, it's lightweight in comparison to Fate/Zero or Fate/stay night. My biggest complaint about the show is that it doesn't spend enough time on the serious moments, making it constantly feel like it's in happy mode.
Now for some fanboy moments.
Even with my hype, I'd say this show is pretty bad for Fate newcomers. If you're new to Fate and don't know where to start, please read the original Fate/stay night visual novel. This show also doesn't make a lot of sense if you've skipped over all of the previous singularities, so you may have to read them or play the Fate/Grand Order mobile game.