The colors in the batch I received (22 sheets, 2 boxes) had fewer dark stones, more lighter stones which is ok for me - just don't expect it to look exactly like the picture here.  On average one stone was loose/free on each sheet, making installation a bit more difficult.  And on average, one stone had yellow adhesive on the "up" side - probably because they didn't allow the adhesive glue to dry before packing them - which is also probably why on average one stone is free on each sheet.  Two sheets out of 11 had a completely missing stone - making me scavenge that from a partially used sheet.  

Pros: Some sheets look beautiful
Cons: sloppy assembly causing some stones to be loose and to cause some stones to have yellow glue residue on them.