You didn't indicate which system you were considering. I don't know anything about their products but did purchase a Voyager WVOS511 Digital Wireless
system earlier this year. Have towed with it three times and the reception has been acceptable.
I have it mounted on the rear of a 29 ft Alpenlite towed by a F350 CC. Depending on 'where I'm at at any one point' during the travel/highway. It might lock up the video for a second and the signal strength might be one/two bars. When driving within the parks and backing up I've never had this problem with the video. I have it adjusted to see the tip on the bike rack and can see back to about 40-50 ft behind the unit. It has a wide view which makes it easy to see what's close behind the camper during travel or backing into a spot.
I bought the unit at Camping World on sale in the $500's and was an easy installation. I would purchase it again.