Being the cheapskate that I am, I own two el-cheapo brand NMO mount antennas that are designed for 2m/70cm operation. Both claim gain figures that I ignored. On one of them I can permanently bend the whip with just my thumb and forefinger. Its really poorly made. Both are mounted on NMO outfitted magnetic mounts. One sits on the railing of my fire escape (don't tell) and I made a set of 2 meter and 70cm radials for it. The other stays in the car. Its a lease. I don't have any practical means of drilling a hole in the roof and my wife would kill me. I also operate V/U FM mobile only on rare occasions. Performance: I can access all the desired local FM repeaters with no problem using my HT's 5 watts through 8' of RG58. The mobile antenna stays inside the vehicle except when I use it. It performs significantly better than either the HT antenna, or a roof mounted 2m 1/4 wave vertical on a similar magnetic mount. Clearly its not the best way to do things. But it works for the application.