Mangaka Akamatsu Ken posted his impression of Mahou Sensei Negima! Anime Final on his twitter. He said the script had been altered from the original scenario and it will be a little bit difficult to comprehend the story because some required explanations of the background were omitted. He asked the fans to remember the following three points before watching the movie:

1. The graduation ceremony will be held on the next day.
2. Negi has to choose one girl as his formal partner before the temporal contracts expire.
3. All the classmates other than Negi's formal partner will lose all their memories of magic the next morning.

He added that the battle scenes were well-done and the climax was impressive.

According to Kodansha, the story of Negima Anime Final was changed from what had previously been announced due to the circumstances of the production. Judging from the schedule of the premiere event, the length of the movie was shortened by 20 minutes.

Source: Akamatsu's tweet, Kodansha