It's all a bit silly but it's fun.
There is absolutely nothing original about this film and the outcome is entirely predictable. But I think it doesn't matter. I like the cast and I think it's interesting the way a bit of focus is given to so many of the very minor roles - it seems to give a little more depth to the film. There are also some nice iconic moments like moving the shuttle along riot damaged streets and I don't think they overdid or relied too heavily on the special effects. Obviously there is a lot of CGI as they gleefully flood California and throw huge objects around but I thought the Moon sequence was actually pretty good. So I enjoyed it and I'll watch it again sometime as undemanding popcorn entertainment.