Binged this in about a day. Yeah yeah, its mainly only teenagers this season (because that's the plot line y'all) and while that may not be everyone's cup of tea (i'm looking at you low-voters complaining about the age of the characters), its realistic that a large group of teenagers being stuck in a world alone together are going to have teenage problems, they're not adults so don't try to treat them like they're supposed to be. Also, I find it unfair to rate/review a series until you have finished the full thing. Its just a little pretentious to have such strong opinions about something you didn't put any time or effort into finishing.
Its not just rich kids/poor kids, popular kids/unpopular kids, its a full range of characters with different viewpoints and personalities that many times clash. I find that when comparing the range of characters to the nine alignments (lawful good, chaotic neutral, neutral evil, etc), you can find at least one character that fits into one of the alignments, creating an interesting dynamic throughout the group and storyline.
The story was all together interesting and entertaining to watch. While they give you clues throughout the episodes about what may have happened to them the last episode leaves you with even more questions. I am certainly eager to know what happens and hope that it does get a second season.
All in all, if you're looking for something entertaining with a dash of mystery, definitely give it a watch. However, if you're not at all a fan of shows with a primarily teenage cast and that is a show ruiner for you, skip it.