I really liked the way the dystopia was done - Jonas thought it was great, that was very clear and everything was presented as his worldview. Yet as the reader you were aware of the disturbing undercurrents, particularly about people being "released". I figured out long before it was made clear what this was, and I imagine everyone (even the target audience of children) does. Which made it creepy beyond belief seeing Jonas's innocent and naive perspective. The constant surveilance and the strong emphasis on conformity & crushing of differences also came across very effectively and disturbingly.
The book is kinda science fiction (ie, we're in the future, and it comes across as derived from our world) but really I think it's fantasy, it's not an actual extrapolation of our world and the tech/concepts aren't necessarily plausible. In particular the memories thing is mystical rather than scientific. But I was very much willing to go with that for the sake of the story and the questions it asked. Is this a price worth paying (generically) for no war, no hunger, no conflict? Would you be willing to be the one who knew this was the price that had been paid?
This was a good book, and I enjoyed reading it, but the last third (or so) of the book felt flawed to me. SPOILERS: Jonas and the Giver decide that things must change, after Jonas learns what "release" really means. And then they concoct some plan where Jonas will escape but that will somehow be the same to the community as if he'd died (this seemed inconsistent to me with how I thought the memory thing had been established), and then the Giver will somehow help the Community get over the return of the memories. Except the way the Giver was helping Jonas only seemed to me to be by talking to him etc. And I had the impression the Community was too large for him to seriously spend a significant time talking to each member. So I was left unsure both of how the plan was meant to start or play out. Maybe I missed something? I also wasn't clear why they thought this would change things for the better - yes, I wouldn't want to live in the world of the Community, this was a dystopia no doubt about it, but not all change is necessarily good - I could imagine worse places than the Community to live in. This was also the only bit where I felt the children's book nature of it let it down - I think I would've liked a more adult take on the same story, this felt a bit like it took a sudden turn for the optimistic (with the plan, and I know from the internet that in one of the sequels it is confirmed that Jonas lives). And I think I would've prefered the creepy, disturbing and twisted vibe to continue through to the end. END SPOILERS
My overall feeling then is that this was a good book that was let down a bit by the ending, which made it "good for a children's story" (if you see what I mean). Glad I got round to reading it.