I saw them a while ago and yes, they are horribly cute, almost cinderella 5 -year - old cute IMO, almost bordering on tackily cute because of the plasticky look. :s
It did not however seem too fragile. I looked specifically at how the charms were fastened to the scarf, it looked fine.
Personally, my first thought was that they'd look best on a baby (allthough it would put it in danger swallowing the charms etc). Or perhaps if your style is "japanese-lolita-decora-ish". I haven't seen it on anyone though, it would be interesting.