Solid mirror. Almost too solid, as you really need to block out your wall properly before sheetrocking in order to be sure this is going to stay affixed to the wall. Very heavy, nice quality look to it, but the pictures on the website are not good enough. You look at the frame, and probably think it is flat, but it most definitely is not. It curves up from the edges, so that the mirror juts outward toward the mirror frame edge. The pictures also make it look like there are sharp angles on the corners, but they are quite smooth, and you dont see angle lines like in the picture. They are there, but they are MUCH softer and sloped. So the overall effect of the mirror is softer. Plan accordingly.