It was good but not great, my least favorite of the indy movies but still an enjoyable romp. The 3 waterfall thing bugged me a LOT since they made it over all 3 perfectly fine and the boat was not even dented. Also some of the magnetic things bugged me too like how the soldiers dog tags were moving towards the box but not their guns, belts, etc... I know its minor.
One thing I loved was seeing the ark of the covenant when the one box fell it was a great nod to the old films.
I do believe the story could have been a bit better, but have no real qualms with the aliens except it just seemed a bit out of indiana jones canon. I have wastched all the young indiana jones, read the books, seen the movies dozens of times, and it just did not sit right with me. I feel like the Indy movies have always had a religious push toward a higher truth and such, temple of doom not so much but last crusade and ark definitely, I guess I wish it was more of a religious find (something like the spear of destiny.)
I did not like the intro with the gopher and shia speeding past the people it seemed very tacked on. I much would have preferred it starting with him lecturing in school, maybe some wise ass kid cracking about what does he know, and then segway into the story.
That all said I give it a 7/10.