Super 8 was a bit shite.
It's basically all those films from the 80s about kids having adventures mashed up with sci fi schlock and JJ Abhram's trademark CGI flair, except most of the kids are little shits.
Problems:
Dialogue - There are long stretches of the film where the child actors just shout "Holy Shit! Shit Shit Shit!" when running away from something, or just shout about what is happening. It's almost like it's unscripted, and they just left child actors who haven't learnt to improvise well yet to just improvise whole sections of the film. It doesn't seem natural at all.
Action - Whenever the kids are running away from stuff, it's so bloody obvious that they are no in harms way. It's almost as if they were just running where they were told to run, and then dangerous stuff was CGI'd in around them.
Predictable - It's really really predictable. I'll put some of the stuff that was obvious from right on at the start here in spoilers:
ZOMG Spoiler! Click here to view!
The kid with the fireworks: As soon as he mentioned that he like fireworks, and everyone else got annoyed at him for using fireworks, they were obviously going to be used to save the day.
It was obvious that the two dad's were going to make up at some point because of their kids being friends.
I've already seen ET, so I pretty much knew how it was going to end.
Ending - stupid and doesn't really make any sense.
I'd not bother.