I love these tiles!   We just completed a guest bathroom.   These tiles arrived very quickly (sooner than stated) and packaged in boxes with protective covering that were packed in another box and not a single tile was broken.  We were worried about the install because of the shape but it was easier than expected.   They did not chip either throughout the project.  It took at least 2 days to install (my husband did it-first time tiler but has experience in remodeling).  

Grout- We chose Polyblend non sanded grout in pewter. (Home Depot or tile shop).  However, I think we could have used a darker grey.  
Spacers-We used 14 inch spacers.  
Versabond white thinset (Home Depot).  This was put on floor to hold tiles to floor.  
We also put a sealer over the tile when we finished.  SurfaceGard maximum strength sealer. 

I was so happy with the outcome and love these tiles!