I have been using one of these little guys for about a month now and have a couple of observations from my usage

1. So far just as much range as the full size antenna and equal the sensitivity - I got a lot of gyr tracking practice this season
2. Works much better in the truck - don't have to worry about poking an eye out. This is especially helpful when the gry has turned on the afterburners and it is -10 degrees out
3. Great to use from an airplane - Had a pickle this season and needed to get in a plane FAST - didn't have time to rig up and external mounting system for the antenna which would have been difficult in the retractable gear low wing plane we had available short notice. This was small enough to get good directionality in the cabin.

I really encourage anyone thinking about one of these to upgrade plus you will have your old antenna as a back up. I am thinking about turning mine into an easily airplane attachable antenna and have a kit already to go on short notice.