Just finished it last night. My review is somewhat more mixed, but I still liked it. The music really drew me in (I think it was done really well) and I continue to think the story and themes were more interesting and relevant and timely than in the other shows in the universe (haven't seen Iron Fist yet, so we'll see). I did have a few beefs that I enumerate below:
1. Diamondback was a bit overacted. Villains can be crazy megalomaniacs if they are, say, alien demigods (a la Loki) but it's a little overdone for someone nursing a childhood grudge. Partly a fault of the writing and partly a fault on the acting.
2. There was a bit of a lull of wasted space in the middle; not as bad as the doldrums I suffered through with Daredevil and JJ, but still a bit slow. I think the 9th episode was a waste of time in particular IIRC.
3. Mercedes made some piss-poor decisions that were just unbelievably bad for someone who's supposed to be a great detective. I have trouble suspending disbelief for poorly thought-out character development.
4. To an extent this suffers from Superman syndrome: it's hard to write a storyline about someone who is more or less invincible, so there's only two stories you can tell: threaten people close to them or find their Kryptonite. It's a bit mitigated by the implication that Cage is susceptible to dying through other means, but it's never really employed here.
That being said, I really like the end - I loved that they didn't tie things up neatly and left some ambiguity. I would have liked there to be a bit more consequences for Cage (especially re: the cops) but overall I liked it.