Saw it on the bigger screen, which was worth it. The worms were quite large. The movie has a great way of passing across the grand scale of the world in a way that michael bay can never understand how to do with his robots movies.
It did stretch on quite a bit, looking back not even sure where all the three hours went. Its just all shaping up for the big battle with a bit of political intrigue here and there. Also, still have no idea how they get off the worms or how they load up large groups of people onto the worms, like, can they stop the worms whenever they want and let people climb on, and then giddy up, but if thats the case why dont they have stabled worms ready to go.