I enjoyed it. It was by no means perfect, but there were things to admire. The best thing I can say for it really is that it doesn't diminish the films that came before it, and in some ways enhances them. I liked that it fixed some of the holes in the original trilogy; Vader says he killed Anakin, just as Obi-Wan told Luke, and you learn why Obi-Wan calls him Darth, and why Leia doesn't mention that she knows Obi-Wan in her hologram message, and why Vader abandons his obsessive search for Obi-Wan.
It was good that the unfairly-maligned Hayden Christensen got to have another crack at playing Anakin, and that a few other actors who were criminally underused in the prequels got to flesh out their characters a bit. You get an appreciation for the lengths Owen and Beru went to to protect Luke, and it makes their demise in the original film that more tragic. Similarly, Alderaan is a lush, living planet, and its destruction actually means something now; it's not just a plot device.
It would be easy to punch holes in the plot, there's always a few bits in these things that stretch credibility, but why would you do that unless you're determined not to like it in the first place. The writers' hands are tied by the fact that most of these characters need to survive another decade or so. We all know that it doesn't make sense for Obi-Wan not to kill Vader in his weakend state, but the narrative can't allow it.
So yeah, It was fine. It passed some time pleasantly enough.