My son and husband went with me and my daughter to both twilight and this movie, they got Twilight and liked it, but not so much New Moon. Having read the books and the 2nd being my least favorite I am not surprised. I thought the movie was just okay. I expect Eclipse to totally "eclipse" this movie. This movie was definitely for the die hard book fan.
This is a child's movie and so I would suggest that it be seen with your children, if you have them, or not at all. It lacks substance to keep adults adequately entertained. I went with 10 children for a birthday party, they all loved it and no one was scared-- ages 6-11. The three adults agreed it's a snoozer.