We recorded it and watched it yesterday (Tuesday).
It was "cute". A little too cute for my tastes.
They take many, many liberties with the Superman/Supergirl mythos.
Her relation ship with her human sister is exploited beyond all belief and the introduction of Jimmy ("It's JAMES") Olsen is a bit much to take and, for the life of me, I cannot see why she confided her secret to her other co-worker.
And, the apparent running plot seems to be a direct ripoff of what kept "Smallville" on the air for years, albeit with the grudging participation of the government. Her aunt is an interesting turn.
On the plus side, she's as cute as a button and, IMNSHO, Calista Flockhart, as Cat Stevens, another tribute to the mythos, has the best lines. Having Dean Caine and Helen Slater as her parents is a tip of the hat to those of us who have been following this stuff for years.
All in all, a C+. I'll record it and watch it sometime during the week but I can't see it outperforming Gotham. It's easily outclassed by Arrow, Flash, and Gotham.