Decent watch, but not great. The concept is a bit different because it focuses on teen girls stuck on an island -it's like a Lord of the Flies meets Lost, but with Teens. You do have to get past the first episode to start enjoying it and it does get a bit better. I was entertained but could have also easily have given it a miss, there was nothing profound or groundbreaking that happened and although there were diverse characters with varying backgrounds, they were hard to relate to.
I think a lot of the negative reviews are because it takes a few episodes to get into it, understand it and mainly because the majority of the characters are unlikable. Most of them (aside from one or two) have little to no redeeming qualities and are irritating beyond belief. I don't know if it's intentional but most of them are horrible, and despite having "reasons", they're portrayed in a way that makes it hard to feel compassion or relate to. A few characters also don't quite make sense, the major plot has a number of alarming holes but maybe these will be addressed in the subsequent season. There is some bad acting and after a few episodes I now understand what the reviewer who said it's for a reason, meant. I do also have to say, as much as I despise Leah, the actress who portrays her gave a great performance - she plays unhinged brilliantly. I also think Fatti is underrated.
Generally, I feel like they missed an opportunity to do more with this type plot- There could have been more suspense, drama, more character development and more interesting questions on ethics. All in all if you have time to kill it's not awful but it really is anything great or even that I'd feel comfortable recommending.