I've had my iPad nearly two months. I let the kids use it and so far I've had no problems at all. It seems very robust. I carry it around in my handbag and it gets bumped around quite a lot, but hasn't caused any problems. It is in a case though.
The only thing I would say is that I've been a bit disappointed with the battery life. I leave it on charge overnight, but it seems to run down quite quickly.