I realize 2 years of RN experience is recommended before taking the CEN exam, but I just couldn't wait any longer!
I've been a paramedic since 2003, and I've been working in the ED since 2005, but less than one year as an RN (my "anniversary" is in July). I took the CEN today and passed, by a comfortable margin, too. Woo hoooo! I'm so happy!!