I went to this on Saturday with SWMBO and enjoyed it. Far from the greatest movie ever but good enough for popcorn. Won't say it's good enough for a sequel but I'm sure that's on the way regardless.
The question in my mind though is this: What was the point of this being in 3D? Aside from my general dislike of 3D this went waaaaaaay beyond that. Throughout the movie I kept slipping the glasses down to see if there was anything happening and other than being blurry the answer for the most part was no. So I guess this then is how they jack movie prices by $3? And the ad at the start telling me to be green and recycle my glasses? Kiss my ass. If you'd let those responsible enough to retain their glasses and pay a reduced fee if they bring them it'd be a hell of a lot more environmentally friently than repackaging the damn things for every 3D movie that comes out. Gimme a break.
If you are interested, then see it. If you've got the option to watch it in 2D for a reduced price, you won't be missing much of anything.