We went with the latest version of Furrion knowing full well there are a multitude of complaints about their quality. Also caught a few reviews that said they were pretty good. cra p shoot. But overall I think Furrion in general has sketchy quality. They should address this.
One thing we did notice. Some cameras are listed as "backup" and some as "rear view". Believe the cheaper ones are really good at just backing up but on the road there may be a bit of delay time in presenting the video. Meaning the car you see behind the trailer is actually now beside you.
Ours has a refresh rate that's pretty good. That said, it still has a pretty good delay as I see cars next to me (that appear to be just off the left rear of the TT are actually already a foot or two into the left rear quarter of the TT. Thus, those cars need to be further back than what I see before I pop out into the left lane...due to the delay. Refresh rate is where it's at.
When slowly backing, the refresh rate for any of them is probably negligible. FWIW.