There are fairly high production values, but that makes it all the more annoying, because it feels like a missed opportunity.
The characters are uncomplicated and fall into predictable tropes. The acting is generally sub-par, but that may be down to the material they have to work with, as some of the actors have distinguished themselves on other shows. The male and female leads annoy the crap out of me.
The plot is paper-thin and the central sci-fi concept doesn't make much sense - given that this is JJ Abrams, I don't expect that to change any time soon. It all feels too glossy and clean, when it should feel dirty and gritty.
Do not go into this expecting deep speculative fictiom. It's ultimately an action adventure show, and if you hope to enjoy it, it's best to go in with those expectations.