Actually it's the most comic accurate portrayal of DC heroes I've seen around. Even more comic accurate than Titans. It gives me good vibes, tbh. Comic accurate costumes, no genderbent characters... I like it.
It gives justice to Stargirl. Geoff Johns supervised everything, and he invented the character, he's even emotionally related to Courtney. I bet it will be good. Geoff is a master, and the fact he wrote both for Stargirl and for the JSA makes me say it will be surprisingly good.