i got in with very similar scores, 18/19/20 3.65 cum 3.6 sci, don't let the average scores on SDN or predents.com scare you, chm scores could hurt you though
and its just not true that most schools expect you to get 19's on all sections, most schools averages are 18-19.5, so obviously not everyone is pulling 19+'s in every section, watch out for bad advice like that