This is a very useful window. I use it to look up info about the antenna my contact is using, and to check on the width of the beam I'm currently using. It's well worth the price if you're interested in learning about all the antennas. It does have one problem: incompatibility with the 5-band 2el Fan Dipole Yagi. If you listen or transmit with that antenna, the info window locks up, freezes, and becomes non-functional until you restart the transceiver.