Arknights has wonderful music, art direction and characters, and that is its strong side without a doubt. But its weaknesses sorely and horribly outweigh its strengths - its gameplay discourages you from using your favorite characters and forces you to look up guides due to the conservative style it forces from you. And its gacha is easily its worst part - it is very stingy, it will not give you a lot of resources and the drop rates are horribly astronomically low.