I remember the first day I tried it. I was called by a USA station to my activity on a national award from Spain, very happy.
Compared to an X-50 it has nothing to do
Using the antenna for the SOTA program and only 5 W. of power I have managed to make QSO of up to 170 kilometers in VHF
The SWR is perfect, the antenna is a gun and works better than my yagui with more elements.
I have the antenna installed in the lower part of the tower. Easy to assemble and install and what is in these bands listens to it, the truth works very well. Later I will buy another for the 2nd QTH.
I have used it in QRP / Portable with my Walkie and my FT-817. Easy to assemble and transport. Weighs just. Recommended 100%
The change has been noticed, especially in reception. The air band heard it much better than my previous Diamond X-510.
When I compare with the mobile Sirtel 1200 antenna and Imax 2000 the QRM level is lower and I have more gain.