If you are considering dental inlays to replace your old metal fillings, I would go with it. I had a few of them and I thought the metal looked terrible.
After I discovered my fillings were amalgam fillings I went and had the work done as there have been issues raised with amalgam. Amalgam fillings are mixed with mercury and there are many that think they can cause problems in humans when the fillings break down and the mercury is ingested.
While there hasn't been much scientific evidence to support the danger of amalgam fillings, I wasn't taking any chances so I had the dental inlays done in resin. It looks great and now I don't have to worry about health complications.