Mmmm I've watched 3/4 of season 1 n got really bored but then I'm not a teen or preadolescent. It's good for that age bracket but so undermining that a well knowledgeable teen won't buy into it.
It's good that the story has made it to 3 seasons but if you're a true fan of sci-fi n a strong mind and imagination then I wish you well in finishing the complete series.