They're still quite noticable from certain angles. I was mildly disappointed when I noticed silver amalgam fillings on someone's top rear molars, because I had

They're still quite noticable from certain angles. I was mildly disappointed when I noticed silver amalgam fillings on someone's top rear molars, because I had some there too. When the time came to replace those fillings, I was happy to switch to white composites. Choosing the correct tradeoff between cost, appearance and durability is a value judgment. While the importance of appearance is lesser for the rear teeth, I wouldn't write it off entirely.