Just checked that antenna yesterday for 3 flights.
It works well, but as any directionnal antennas, you need to point your plane with the antenna to get it working correctly.
It's easier to use when your plane is far away so you don't have to ajust the antenna position so often.
I recommend to use this antenna on a diversity setup, so that you always have the signal from an omi-directionnal antenna if you get out of the range of that one.
Overall quality is good, and it seems less fragile than a x.turns helical antenna.Just be aware that the propper orientation for this antenna is NOT like with most other patch antennas. You must orient the arrow on the antenna towards the model. If you do that, the antenna works wonderfully. I got lots more range and lots more tree-penetrating capability with this antenna than with the immersion rc cloverleaf antenna. Highly recommend.Useless antenna, no difference at all in my diversity system, went around and in between the trees at about 200 meters and lost almost full video reception, even tried facing the antenna the other way around with no changes at all, besides it produces so much noise that somehow when I place My radio close to it the screen on my transmitter gets crazy, overall a complete waste of money