It's not highly likely to win many new converts, but for those who already like the original and want to see more of that world, it more than satisfies. The visuals are a wonderful evolution from Tron and the story of a father and son who have to make up for lost time is very touching. The CGI face they developed for Jeff Bridges is not perfect, but it works very well with just a few exceptions and I feel, for my own tastes, that they have actually bridged the uncanny valley with this one. Still a bit of work to get it perfect, but this one works as it is. Oh, and the score by Daft Punk is beautiful. The first thing my brother and I did after leaving the theater was buy the sound track on the way home. It's very suggestive of the original but with plenty of today's newer sensibilities mixed in.
I don't know what people are whinging about in some reviews you read about it. This film is wicked. I get such a buzz from this film's imagery, soundtrack and set design. It's also philosophically sound, though apparently this aspect seems to have gone over a lot of people's heads. Be. What does that verb really mean? Figure that out and the architect and high level software engineer's awareness will jump out at you... ...Otherwise it's just a pretty movie, eh? Lol. Like Annony said above, the producer Justin Springer is hoping for a Tron 3 to be in the making but it keeps being shelved (like the Legacy sequel).