I have the Winegard but don't use it in motion. I tried it a few times to use the music channels, but got tired of the noise it made. On a straight road it might be OK, but keeping up with the satellite on a curvy road generates a lot of noise. Maybe someone knows if the TracVision is quieter?
I use a Motosat T-2 Automotion... And I too agree it's noisy as the step motors do their thing but when I'm going down the road road noise and other vehicle sounds fully mask the sound of the steppers... I have to actively listen for them to hear them and then I can' talways hear them.
Also it is advertised as having the best rain performance of any dome (I'm not sure how much better but it does hold in a light shower)
I have the Winegard Movin' View stationary unit. It works very well. I was talking to me dealer about upgrading to Movin' View in motion. He said he would really discourage me on doing it. He said he has replaced several of the in motion units because they don't track very well. He thinks Windgard has a software issue with the GPS. He suggested I wait until that issue is taken care of.
I cant speak first hand, but I don't think he would lie to me when he had a chance to make some more $$$.