Not in the least childish, I thought.
I saw it, The Illusionist, the Good Shepherd and Ghost Rider this week.
I enjoyed the Science of Sleep, although it's hardly groundbreaking. The Illusionist was interesting, Norton is magnetic, Giamatti was as fine as usual and the interesting use of differing direction/cuts to signify the varying illusions was fine work. The Good Shepherd was wonderful, slowly paced I suppose but it's a fine work, well written and somewhat majestic in De Niro's direction. Ghost Rider was shockingly bad, it wasn't even ironically bad, it was just terrible.