Pretty bad. I was fooled by the mad reviews this title is getting. The first chapter is good and implies the series will be hard hitting with deep insight like "A Silent Voice" or "Takopi's Original Sin". But then the rest of the manga is just bland, shallow, awkward navel-gazing. It's one thing for the MC to struggle with dysphoria, but the MC never does or thinks anything.
For example, like halfway through, the MC realizes that tomboys exist and that girls can do traditionally boyish things. First, what a deep philosophy to spend twenty chapters building towards, but second, and most damningly, the MC doesn't do anything after her realization. A large component of the MC's malaise was being unable to participate in the activities that she had enjoyed as a boy. But when handed a golden ticket, then MC doesn't resume those activities. Worse, she doesn't even try.
(Like, it would be interesting if the MC tried to participate and was rejected, sparking a new round of different navel-gazing. Being psychological or introspective is fine for a manga, being boring is not.)
I guess most readers like this manga because they "feel so seen" or something. Personally, I found it an extraordinarily frustrating and disappointing read. (which is why I wrote a novel to vent, lol)