I started it a few days ago, and at the end of season 1.
Its fantastic. I'm usually not into detail driven sci fi. Like world building and all that shit. But this show doesn't do any of that in a bad way. Its just details that sketch the universe out and make it feel cool.
I also love Dark Matter, which is a very different show, but also very similar. Dark Matter is what I would call fun sci fi, more humorous with crazy things going on. I thought I would not like The Expanse because I tend to like my sci fi like the Expanse. Using sci shit, to have fun, to create drama, tension and humor, and do whacky awesome things.
But I am seriously hooked on Expanse at the moment. Going to finish off the first season right now. Looks great on Netflix too. Don't know if its HDR, but it seems it.