Just watched the movie. Heartwarming ending and would recommend to watch. Decent plot, Riley going through her teenage years is a very interesting idea. Though nostalgia should have gotten a little more screen time. [Spoilers bellow!] And being left with a "cliffhanger" of Riley at the end doesn't fit a lot with me but I'll let it pass as it's an easy to guess cliffhanger.
Nostalgia is a joke to the emotions as one of the emotions stated when she was shown for the first time "Nostalgia! You're not meant to be here until 10 or more years!" Or something like that, which is pretty funny as the fact she was shown ALL her screentime from teasers of the movie. And with the fact all the emotions yelled at her when she got screentime the second time.