If you are talking about the prints on Kodak Metallic Paper, or Pearl as Fuji call their almost identical finish then as well as bright well saturated images it also works really well for black and white images too. A couple of years ago I got some samples of the Fuji Pearl at a photography show, and one of them was a black and white portrait. It was a very compelling print, the trouble is that you really cannot show the effect well in a photo or scan of the print. I had this image printed on Fuji Pearl at 30×20 and anybody who sees it is usually very impressed.
My daughter has recently started to take my old 20D along to the car club she goes to with her boyfriend. She took this a couple of weeks ago, and the owner of the car has asked to buy a copy as a print, which is going to be on the Pearl paper too. Yes it is indeed a very saturated image.
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Still waiting for it to come back from the lab, but expect it to be superb. I normally do straight glossy prints ost of the time, but for some subjects this type of paper just adds that final something.