Very well done, but not quite up to prior netflix superhero shows for me. I'm at episode 6 or 7, and I'm finding it somewhat slow, comparable to Jessica Jones before that picked up speed. There just isn't a ton of tension given that he is bulletproof, and there is no loved one to kidnap. Luke Cage's super-mellow personality doesn't really help - he doesn't get drunk and smash stuff, punch through a wall in anger or really show much of any emotion. I would also say something about the supporting characters, but I forget how to do spoiler tags.
I do really like the actor who plays Cornell, the villain. He has real charisma.