I have the Winegard Movin View MV3500A auto system (but not while driving). Works ok, but recently had to replace the LNB. The symptom was intermittent, to no, SAT lock-on (no steady tone; no signal strength; continuous search). I was (just) within the 2 yr parts warranty, so it did not cost me. Installed it myself. Having said that, they sent me an LNB with a large diameter arm, which did not fit the clamp. So I used the one that goes with my spare tripod dish.
Thudman