Absolutely thrilled with how much effort the writers and producers put into researching DiD. Granted, it's not perfectly represented (ei, the seizure-like transitions when alters exchange fronts, or the level and degree at which Marc and Steven are able to communicate with each other), but I'll chalk it up to cinematics. Otherwise, the team did wonderfully in providing a sad but perfect example on how a system is created, and how assigned alters are tapped in to deal with particular stressors. Oscar Isaac did a wonderful performance to convey the distinct personalities of each alter. During some scenes his body language and facial expressions are nuanced enough that it seems natural, but noticable enough that it grabs the viewers attention.
I hope that Marvel continues to create more character-driven narratives that refuse to ride the coattails of other titles. It was refreshing watching an independent series from the larger MCU, with entirely fresh faces that the audience can generally sympathize with even without having experienced their struggles. Would recommend this title to anyone, even if the viewer isn't interested in typical superhero flicks - Steven Grant is endearing enough that it almost doesn't matter what genre the series aspires to.