Given how bad some of the most recent superhero films have been, this one isn't that bad. That doesn't mean it's good, it's just not that bad.
Good things -
The acting is really good, especially from the 3 teenage girls. They steal every scene they are in.
Editing - really nice. A lot of the flashbacks and flash forwards are done so well they created interest and tension.
Plot - it's ok too. A bit far-fetched but it's a movie and it's a superhero movie so the fetched isn't that far.
Bad stuff
Continuity - ok it's a superhero film but it still needs to have continuity.
Loopholes - not related to the poor continuity, there are so many holes in the story you could drive a million giant spiders through it.
Good things -
The acting is really good, especially from the 3 teenage girls. They steal every scene they are in.
Editing - really nice. A lot of the flashbacks and flash forwards are done so well they created interest and tension.
Plot - it's ok too. A bit far-fetched but it's a movie and it's a superhero movie so the fetched isn't that far.
Bad stuff
Continuity - ok it's a superhero film but it still needs to have continuity.
Loopholes - not related to the poor continuity, there are so many holes in the story you could drive a million giant spiders through it.