At 30cm long, Countrywide creates fewer joints than a smaller brick-shaped tile, so the finished wall has a relatively calm rhythm. That's useful if you like the character of handmade-effect tiles but don't want a highly detailed or busy-looking surface.
The horizontal format feels particularly natural across kitchen splashbacks and longer walls, where the length of the tile follows the architecture of the space. Turn it vertically, however, and the same proportions become much more directional, drawing the eye upwards.
The interesting part is the contrast between the orderly format and the slightly irregular edges. You get enough structure to keep the room feeling clean, with just enough imperfection to prevent the wall becoming too rigid.