The intended epic finale of Godzilla is not as...well, epic as it should have been, and even has its false advertisement at hand (not ALL the monsters shown on posters and trailers actually fight), but this was a huge relief for me, after many miss Godzilla movies that never reached any expectation. Destroy All Monsters puts many monsters to fight King Ghidorah...at the last 20 minutes, but it sure worths it, after going through some uncaring human story reaching aliens.
And that's the main problem with Destroy All Monsters: it's mostly the humans trying to reach the aliens in order to take control of all the monsters running loose. While it's not bad, it surely is disappointing. This was, as previously mentioned, supposed to be the final Godzilla film, and for such film, one would expect more of Godzilla in it, but the film gives us not as much as we could hope. However, all the fails are forgiven thanks to the big match at the end, which one can simply skip right into it and avoid the non-Godzilla story.
Destroy All Monsters is either one of the best Godzilla films or simply one of the good ones, without many responsibilities in characters or story. Even after many films, the first one (Gojira) is still the best. I can safely say, Destroy All Monsters is pretty good, entertaining and kinda satisfying. Check it out, but you may want to jump right into the final fight to avoid any issues.