I bought these August 23, 2012 and so far they are holding up nicely.  No cracks, chips or other problems.  They have a lovely, ringing sound to them when they strike each other.

To wear them I have found you might need to bend them open slightly, but don't bend them at one point only, spread out the bend over the length of the entire bracelet, a little at a time.  Slip the bracelet on past the narrow part of your wrist and then carefully and gently apply bending the entire length of the bracelet to close it around your wrist.