2 cents from someone who is not that familiar with the Marvel Netflix heroes and has a lot of time right now because I don't have a job.
I binge watched this show recently. I think what got me to binge watch IF and not just stop after an episode or two is my curiosity to find out how Danny was going to get back his company. I also felt the tone of the series is lighter. Maybe not true but it felt like it to me. DD and especially JJ was really really difficult to watch because of the violence. Lastly, I have a soft spot for kung fu.
Overall, I enjoyed IF but there were a lot of things that could be better starting with the action scenes. They seem slow and janky for kung fu experts.
When DD came out, I watched 2 episodes then stopped. Skipped JJ. Watched 4 or 5 episodes of LC. However, after watching Iron Fist, I was inspired to go back and watch all the other 3. Because I am aware that this is a shared universe, I was curious to know more about some of the characters and events that was referenced in IF. Like Rosario Dawson's character or the Hand. So now I am all caught up on all the Marvel Netflix series and looking forward to The Defenders.