it is absolutely too early to give a review on this when it was just released, but my god it is so good. everything feels so polished, and it pays off greatly because the levels are so fun to play. they'll kick your ass, but the ranking system is very forgiving, so don't shy away if difficult rhythm games aren't your style.
there's also a huge amount of custom maps made for this game already. pick it up if the early access label is what's scaring you from getting it this early.