This is just a light comedy, a good thing to watch on a Sunday morning, if you want to take your mind off things. It's neither very funny, nor very bad. I think fans of the show would be disappointed in that this is not really an adaptation of the show itself, but more of the theme of a witch marrying a regular guy - it's just that this witch happens to be cast in a remake of the show "Bewitched", so what we get is sort of a movie within a movie. Another thing is that there's really not much magic going on (well she's hiding her powers, what are you gonna do). There are a few good jokes and a lot of references to the original show; nothing's very creative but the clichés don't kick you in the face, either. All the performances are up to par, the CGI is decent, the casting could not have been better. Let me put it this way: the movie is like a cup of good hot chocolate - it's a pleasant thing but you won't find yourself writing home about it.
