I'm not this much onto the story (pure personal taste), but wow.
The quality of the rendering is amazing. If you add to this the well done, and live looking, poses, the works on the lighting and the camera angle, some of the CG are pure visual orgasm. Hell, the one when you kiss Alex on her forehead... everything looked more real that it would have in real life.
The story writing isn't amazing, but still just one step bellow the best available here. I found it lacking of depth, but it clearly not lack of coherence nor realism. The dialogs fall right in place, and the actions, as well as the reactions, are perfect.
But more important, from my point of view, the balancing between both routes is perfect. While following or not Mei route obviously change the story and the scenes, unlike in too many games following it don't deprive you of points with other characters ; you always have a possibility to indirectly earn the point(s) with Meghan. It really is two alternate sides of the same story, not just a "cheat on your wife or not" approach.