Early gender scan?

j
I am very early in my pregnancy and already so anxious! My fiance and I have talked about possibly getting an early gender scan at 14 weeks. There's a 3D ultrasound place in my city that does them that early instead of waiting until 18-20 weeks. If they can't see baby's gender they offer a free visit to come back and find out! Has anyone done this? Is it worth it?