It's interesting if you know where it comes from. According to the author, she got the idea from how everyone categorizes themselves in high-school/college (jocks, nerds, etc). And thought about how that could work if a government based itself off of that idea. The basic idea is that five different "personality types" (or factions as they're called) each have their own area of expertize and end up balancing each other out.
Basically how it works is that kids stay with their parents faction until they're 16 and then they take a test to determine which faction they belong to. Although problems start when people either qualify for multiple factions or none of them...
It's definitely not the best written work around, but I found it's premise more interesting then... oh, The Hunger Games. Mostly because grouping people together according to their personality types is something we do all the time already...
Although if you really want good dystopian fiction, read Brave New World. I like that one even better then 1984.