These extended mirrors snap on mirrors work great. They are extremely easy to get on and remove. I’ve used them for one trip so far, with over 200 miles on the highway and about 50 on bumpy dirt roads, and they never wobbled or vibrated once, and I’m extremely attuned to, and irritated by vibration noises in a vehicle. They function just as I want them to, providing a good view of what’s behind my trailer. They look good and the fit is so seamless, they almost look like a stock mirror.One potential negative is the plastic they are made of doesn’t feel very sturdy. I feel like the tabs that hold them onto the truck’s mirrors could be broken fairly easily, especially when removing the snap on mirrors from your truck - we’ll see.