My DS, 5 at the time, did not like it. He could not wait to leave. Although, he liked the milkshake. DS is a little sensitive. It was the dark environment of an old school drive inn theatre. Coupled with the content.
Our DD, 3 at the time, was not bothered by it.
I don't particullay care for it either. I feel that they have a good thing here, but need to modify it. I would love to see 30 minute short movies instead of mini trailers from days gone by. There is no reason that they could not produce old time shortmovies on scifi themes.