It may still be unnecessary, but it does many things right for a forth installment, which is very rare.

Rating: 8/10 (7 July 2019)

It's been 9 years after Toy Story 3 was released and receiving critical acclaim from almost everybody and giving probably the best conclusion for the popular series that we know today and now 9 years later we got supposedly the final forth installment to conclude everything and after hearing the news for the new film, people started asking the questions: was it worth making a forth film after the third film's ending and does it have a story that is worth telling? For me the answer is yes and no at the same time, since we all knew it wouldn't live up to the expectations that people have, even Pixar probably knew that. After i watched it in the cinema i can say that i liked it, but it does have problems, which did bother me and it may be different for some.
The positives:

I thought the story was very well written, giving some great moments and having a nice ending of the series that started Pixar's reputation, but i don't think it's enough to make a fourth film for that reason;
Woody, Buzz, Bo Peep and the new cast of characters are all great and everyone has the perfect amount of screen time;
The animation is of course breathtaking and improvement over the previous three films with some moments that looks almost photorealistic;
The cinematography is great and every shot fits perfectly to the film;
Huge percent of the dialogue was great in my opinion with some nice lines here and there;
Ones again the acting is great from everyone, including Tom Hanks and Tim Allen;

The negatives:

When the story is involving the old characters it's very weak, uninteresting and are the slowest moments in it and the beginning does ruin a little bit the ending of the third film (it's not a spoiler, since the trailers shows that Bonny isn't interested in Woody after she creates Forky, even thought she loved him in the third film);
The characters that we know and return from the previous films are barely used for the final chapter;
Randy Newman, who composed and wrote songs for the previous three films, returns again for the film and just like Toy Story 3, the music is very forgettable and unnoticeable and there isn't even one memorable track that i can remember;
There are moments that the dialogue is not great, especially some of the jokes that don't work as the writers wanted;

Toy Story 4 may not be the film that everyone wanted and still having things that could have been better, but it has positives that deserve the praise, but i still think the second installment is the best one, the fist one comes a little close and the third one is the weakest, since it has the same story as the second film. Overall Toy Story is still one of the best series out there and can be enjoyed by not only children, but also by adults.