Columbia graduate school Earth and Environmental Engineering program - good or bad?

Hi everyone,
So I got into a graduate course in EEE at Columbia, however the decision came back in 4 days whereas many of the other universities I have applied to took months. This, and the fact that I heard from a family member that the course I have applied to has an astonishingly high acceptance rate (87%) has got me a bit suspicious. Does anyone know anything about grad school at Columbia or the EEE department in particular?
Thanks!