These are beautiful! But beware... each box contains slightly varied colors within it and a new box will have different shades than the box before, so you need to lay them all out on a big table with good lighting. It takes patience and rearranging to make sure the shades are evenly mixed, but it will look really nice when you’re done. 
DO NOT just let your tile guy put them in one box at a time! This is especially true if you end up buying one more box after the initial purchase... the color could be significantly different and will look really weird if they’re not blended in with the rest of your tiles (note the light blue tiles in the photo. Those were from a box purchased months after the first set that I bought)