II really liked the Loco Roco stage and that it was "mashed" with Metal Gear, loved the contrast of the different games, i think its because they're so different they compliment each other and give a strong strange personality; I associate Metal Gear Ray with brutal, highly emotional and epic moments. Loco Roco on the other hand is playful, vibrant and appeals to a totally different side of me. Seeing those universes interact is a strange feeling, but a good mix I think. And the map itself looks beautiful.
The only thing, on first impressions that hasn't totally impressed is Metal Gear Ray's function in the map, it was incredible when it was revealed but then it seems to just act like another Chimera Monster, Hades or Hydra by roaring at the characters (though Ray does move around at certain times) making it seem abit of a concept re-hash. Its a minor thing though, the map is still one of my favourites.