I bought 3 boxes because I knew I needed extra tiles for mistakes in cutting, etc. I could have squeaked by with 2, but for my best coverage, 3 was best. They were very well protected during shipping with thick, soft foam all the way around.
The first picture shows the number of tiles in each of the 4 patterns in one of the boxes which had zero broken tiles. 
My other 2 boxes had some chipped and broken tiles. One box had 2 tiles with chipped edges. The third box had 2 significantly broken and unusable tiles, 5 which were broken in half and possibly usable for cut tiles, and one edge chipped tile. A total of 10 chipped or broken. Only 2 were a total loss.
Not bad overall as far as breakage is concerned. I will try to use the broken tiles for cut areas. 
I’m very happy with this purchase, I love these tiles! I will try to post a picture after they are installed.