I'm also digging the art direction, Kat looks really good, although my Japan senses tell me they are gonna exploit her in some fanservicey way eventually, mostly due to how the cutscene after getting herself a home and showering panned out. The environments look really nice as well, a bit... lacking in detail, but taken as a whole, they are rather neat, if that makes any sense? As in, the buildings, the background and the setting work really well together to set the ambiance.
Still, my biggest gripe is how long the game went without giving me a save spot!!