Wingard In-Motion roof mounted satellite receiver

I have both the in motion dish and DTV. I also have DTV at home. Antenna works fine. Have received signal as far north as Jasper,Alberta and Quebec City. In motion works fine. Signal interruption going under bridges and under trees but recaptures signal promptly. Rain not much of a problem. Heavy dew could cause a problem if heavy enough to bead up on dome but there are sprays to help that. Rarely happens to me. Have heard DTV easier to capture and hold than Dish but I have no experience with that.