I used this on about 6 pieces of silver jewelery so far and it's nothing short of amazing.  I heeded the advice of other reviewers and only dipped each piece for a few seconds before removing it - some people said it took the finish off but i didn't leave anything in there very long.  This is powerful stuff.  I placed each piece in the container for about 5 seconds, removed and rinsed it with water, then dried it.  Everything looks new, shiny and beautiful.  As for the complaints about the cheap interior jewelery tray, c'mon.  It's a $5 product and the tray works perfectly fine.  It's essentially a round plastic disk with a little plastic stick in the middle.  You drop the jewelery in the jar and pull the stick (lifting the disk) to get the jewelery out so you don't have to do fishing around the bottom.  This is a GREAT value!