I have the RDN in brooches and earrings and haven't had any issues. However, I am careful. A few rules: always put on jewelry over a bed. If it drops, it won't shatter. Put it on in a room with carpeting or a rug--again, if it bounces or falls off the bed, it won't shatter. Be careful how you pack or store it. Don't put anything on top of a RDN piece as it can put pressure on a petal. When you take it off, store it in the box it came in or a hard case. Finally, don't put it in a jewelry box with other jewelry as this could scratch or damage it.
Frankly, none of this is particularly specific to RDN, rather this is SOP for all my jewelry. WE spend a lot of money for this stuff, and it's our duty to care for it if not for ourselves, for the next generation.