MaterniT21 test - anyone doing it or already have?

Rita • 34 years old, married for 2 years, TTC for 17 months, pregnant for the first time! Due February 2017.
Im getting this test tomorrow, it was recommend by my midwife. A little nervous because I've read the results are not always accurate. If anyone has any experience or insight, please let me know! Totally excited about finding out the gender in the next 7-10 days though! That part is amazing.