The positive aspects of the community are positive only for a certain kind of personality. A person who is uncomfortable making decisions, for example, is going to be at ease in such a community. That person does not have to decide what furniture to buy, what books to read, or what career to pursue. A person who is fearful is likely to be comfortable in a community like this. People in a society sometimes seem happy to trade personal freedom for the feeling of safety, and to some degree, that was some Americans after 9/11. I would guess that a person who suffered from sensory overload would find it easier to live in a bland world. And the conflict-averse personality would certainly have an easier life there. For a person who has lived through traumatic experiences, for example a war-torn country, the loss of memory might be a blessing. The problem, of course, is that people are all different, and a successful community must find a way to respond to the wonderful diversity that it is to be human.
I think the previous answers are underrating how desirable stability and certainty are. They seem to be saying that most people couldn't be happy in a community like Jonas's. I think most people could be, particularly if they don't know anything else.
Think of all the stress that we undergo because of the lack of certainty in our lives. If you're in 9th grade now, you are probably already wondering where you will go to college and what you will do to support yourself. You are wondering how you will be able to have a secure life economically. You are wondering if you will find true love and have a happy marriage. Or at least I did at that age. Now, of course, I have worries -- some are the same, some are different, but they're still there.
Imagine not having any of that. Imagine having someone else determine how your life will be. Imagine knowing that your life will be stable and secure. It would not be all bad by any means, particularly if you don't know you're supposed to be having love and other emotions.
So I don't think the community is that bad. Sure, it's got real problems, but we have to realize that there is something very desirable about what they have as well.
Jonas' community certainly would not appeal to most people. However, people who love an intensely structured lifestyle with few decisions to make for themselves might just fit in. The most appealing part of the community to me is the controlled weather--never too hot or too cold.