In my kitchen of all places - I have 2 small sections of bare wall.  I have been debating on what to put on these walls for months... Shelves would be too bulky, the spaces are only 18"Wx30"H - I tried the mirrors and they work perfectly!  Just enough simmer to dress up the walls without being too glitzy.  

Pros: Good weight, great for both silver and gold tones (neutral metallic), adds shine and light
Cons: none