15 Week 3D ultrasound- Gender Peek

Ashlee
Hello all,
​I have scheduled a gender peek 3D ultrasound for 15 weeks. It's an additional price but I'm okay with that as I'm an impatient girl. I know that if the baby isn't positioned right, they won't be able to tell. They offer a free follow up appointment if that's the case. What my question is, have any of you done one before this early? And if so, would you recommend it? I don't want to waste my time if it's not accurate.