Down Side: My 20 month old consistantly wakes up at least once between 10:00 pm and 2:00 am. (Is it teeth, illness, cold, hot, lonely, bad dreams, worry over his stock portfolio? We don't know.)
Up Side: I still get to dance in the dark every night with my son to All the Pretty Little Horses, his arms drapes around my shoulders and his soft tiny man breath on my neck. (And he never complains when I lead.)