I have a 30x40" one of these on my wall from an RVP50 scan. It's OK, but the colour quality isn't really there, there's a bit of metamerism around the highlights (the dyes have quite different reflectivity to the underlying metal) and it has poor detail in shadows and highlights. But if you can get an image that is all strongly-saturated midtones, yes, it will look pretty good. Needs good direct light on it for best effect, like the metallic papers.
Mine is mounted on little posts sticking out from the wall. It's easy to clean dust off - tough surface - but has suffered damage from furniture bangs. And the corners are sharp and dangerous.