There were great parts... and there were not-so-great parts. Acting, cinematography and script were pretty good. The character development was also pretty good (especially on Jessica's part). The general storyline, however, somewhat lacked. Throughout Daredevil and Iron Fist, they made out The Hand to be a huge, dangerous criminal organisation, but what was depicted in this series was seriously underwhelming. Danny Rand/Iron Fist comes across as whiney and childish as he does in the Iron Fist series. I think they tried to do too much with the whole "Black Sky" storyline, it was confusing at times.
Overall, a flawed but great series. 4/5 stars, would recommend.