This is a solid mirror. It's good quality, its arm stays in place.Its biggest feature is that it's curved. Very curved. The downside is things look really small. I have great vision, but it's very hard to tell if the car 50 yards behind me is in my lane or not. The upside is that you can change position, stand up, turn the handlebars, etc and the mirror still shows you a view of the road somewhere on its face.So that's the essence of a convex mirror. You can't see anything well, but you can always see it.