I thought this was a decent first episode, though I agree those first few minutes were kind of weak. I didn't realize John Billingsley was in this; it's nice to see him on screen again. I'm also glad they came up with an explanation for why Gabriel is the guy carrying this supercomputer around in his head, even though it was kind of handwavey.
I liked it enough to give it a couple more episodes, see how it develops. I don't watch anything else on Mondays at 10 PM so at least there won't be any conflicts there.