@hannawantstoread Tbh, I only read the manga up to around where the anime stopped deliberately (for me, it's one of those watch-then-read things), but it's
really good! I would say go for it! The manga is GORGEOUS, really - there's a huge amount of detail in each panel, and its pacing is similar to the anime, so it's not too slow (though I wouldn't have minded that). Diamond no Ace's adaptation was done well, so there aren't many differences, but it's an awesome experience all the same. Especially if you haven't tried binging it. I love the anime a lot too, but Act II's manga does better in terms of art, though the anime gives the "complete" experience.
TL;DR Go ahead! It's a nice addition.