It was ok. I can't say I hated it but I rank it lower than the previous three. The plot wasn't very interesting or suspenseful. We're told at the very beginning what the skull is. There wasn't really a memorable sequence besides the pretty cool car chase through the jungle and the sets looked pretty crappy, if you ask me. Also, I felt like Indy wasn't the main character. I don't mind Shia but I want to see Ford kick ass, not him.
There were quite a few ridiculous moments: the tarzan thing, the fridge, the tree landing, the little rodents, etc.
I'd give it 7/10. Maybe I was expecting something more.