They clearly are not high end jewlry but look pretty enough on your ear.  I've had trouble with backs that stay on...the posts seem incredibly thin compared to all other earrings I have, so I have had one drop off my ear once or twice.  I pay extra attention now to what back I use on them (I often mix and match between earrings).  I find those with some rubber on the back so it can cling better to these skinny posts.  But the earrings do get worn reasonbly often as they look very classy.