i haven't used em but they work great and from what i hear, very acurate. there from stamped metal instead of wire soldered together and contained so they should take a better crash to break em. if you already have bluebeam, swr or like that and want to go further, look into patch antennas like helical, crosshair, etc. there all circular polarized and higher gain that just a pair of cloverleafs
If your reception sucks now, theres usually a few things you can do first to just clear up the picture and make the overall system stronger