Review on High-performance Amateur Dual-Band Magnet Antenna - Tram 1185 by Jeff Payne

Unit works well for us (put on a van temporarily). The only complaint, and not entirely their fault, is that the long (that's good), thin (can't blame them), weak coax doesn't naturally coil up for safe storage. We have to be very careful not to overstretch it. I'll stick the spiral wire antenna into a strong plastic bag while standing, and that's the best we can do. You probably want it placed on the roof of a house or car and forgotten, but we only install and remove it while in use.