I ordered these earrings from Amazon (Feb 2012), and I am returning them.

I was hoping to find some 'go with everything' earrings that I could shower in, sleep in, etc., but the lever backs were very bendable.  I don't want to give them special care, so I'm not sure how long they would last.

Other posters have said how you can't tell these from real diamonds.  Simply stated, there is absolutely no way these stones look like real diamonds - even to the uneducated eye, even from a distance.  I'm not sure how anyone could possibly think they look like diamonds, unless they'd never seen real diamonds.  Honestly, Swarovski crystals have more brilliance.

Instead of diamonds, they look like bits of glass, because
  1) There is no fire at all.
  2) They do not reflect many colors.
  3) They don't really sparkle, even under strong light.

I gather that CZs come in a range of quality, having to do with density.  The cut can make a huge difference; these look molded, not cut.  These CZs are definitely on the lower end of the quality spectrum.  Check out Ross-Simons for good-quality CZ jewelry.