The movie was fantastic. I felt that while it was a little hard on Steve, it seems to fall in line with how he was seen and described by those around him at that time. It portrayed him as human, struggling to get in touch with his emotional side and to connect with others but contradicted by his deep dedication to his work, not some wild egomaniac with no sense of humanity. In the end, we did see that and it comes full circle, showing us a Steve who has learned and evolved into the Steve Jobs that his wife and Apple wanted him to be seen as.
Having read the book on which this film was based and authorized by Steve Jobs himself, this seems to be fairly accurate for the periods in his life that the movie covers. It does not cover his life with his wife nor does it get into the later stages of Apple as it became very successful, a period that Steve was known to have softened and become more of a family man in private and open to compromises with his team as a CEO.
The end of the film does appear to set up this next phase of his life. People should go into watching this film ignoring the bad publicity and they may be surprised at how great and entertaining it is. While I was concerned with Fassbender playing the lead, you definitely forget that he doesn't look like Jobs because his character, his personality, his speech, and his mannerisms totally make up for it. At some point into the movie, you accept that you're watching Steve Jobs on screen.