VAS XFire Pro Antenna 915MHz For Crossfire Receivers ULTRA-FLEX

They're okay.

These probably work best on a racing frame. However, for a free style frame I had trouble mounting to get good reception. They're small profile makes it had to place and not be blocked by frame. I fly in some pretty sketchy areas as far as reception goes so finding an optimal placement that offer adequate coverage and protection is a must. I think these are better suited for planes and racing rigs.

Tough Little High Performance Crossfire Antenna - It might be the best one ever

So Far, this antenna seems to perform better that the Immortal T in every way. I'm probably going to switch over my whole fleet. I created a 3D Printed hold for it that really makes installation very easy and very durable. For me, this antenna is more durable than the Immortal T because it's less exposed and takes less strikes. I love this antenna. It's awesome !!

My New Go To

I am getting great performance from this antenna. Since I am not flying very far I cannot vouch for range but Link quality and RSSI are on par with any other antenna I have tried. The size is also a welcomed feature. The Ultra-Flex delivers. I am also going to order the semi rigid as this antenna will be on all my rigs from this point on.