Wish it was greater, but for what it is it's still enjoyable.
'Tomorrowland' is an intriguing futuristic film, it doesn't really delve as deep into its potential-filled premise as it should but it scratches the surface and it makes for - just about - solid viewing. The special effects are very nice, also.
As for the casting, I guess it could've been better. However, I did like the main quartet of Britt Robertson (Casey), George Clooney (Frank), Raffey Cassidy (Athena) and Hugh Laurie (David) - the latter has a good rant late on. I rate the way the story is told, mostly in retrospective by Robertson and Clooney - it keeps it interesting.
I just feel more should've been done with this, given it's fairly entertaining even in its current state and has a load of potential. Either way, I did narrowly like it.