Panorama testing!!!

Jennifer • Mom of a 16 and two yr old...21 weeks and 2 with baby # 3
My question is how foul proof is the panarama testing? And when Gender is given thru this testing is it accurately given for the most part? I was told i am having a girl....just wondering if i should start going crazy buying my baby stuff or should i wait for my ultrasound for reassurance. ..