Mirai no Watashi is a brilliant short animation. I honestly did not know what to expect when I watched it since it was technically an advertisement for McDonald's, but I was pleasantly surprised. It had a quick clear story that was easy to grasp watching the short. The art style and animation were top notch and better than a lot of anime airing this season. The music was good, but nothing to write home about, but the voice acting was cute and sounded very genuine. There's not much characterization you can get out of a minute long short, but somehow the studio pulled off some slight character growth in that short amount of time.
I enjoyed it very much and have actually re-watched it several times. I highly recommend.