My first impression: "Yes! This is what I wanted to ENTERPRISE to be: a Star Trek show that actually looks and feels like something made in the 21st century, instead of a Xerox of a Xerox of TNG."
This. I was excited, and really, really nervous that, in some bid to appeal to the fans who didn't like the new movies, the producers were going to give us something from out of the 90s.
I was pleasantly surprised. And this was the first post-TOS series where I never had to grit my teeth and think, "this is Star Trek, I need to support it, at least." It was the first premiere season in the franchise that kept me hanging from episode to episode. Hell, it was the first premiere season that I made it all the way through.
Some episodes have been better than others, and while it has gone in directions I probably would not have charted, it has never failed to entertain. They did good.