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I use to use one in a photostore when I was doing graphics for them. Use to print on luster, canvas, and regular photo paper for large portraits. Prints came out really nice. The warning light would come on WAY before the ink carts were really close to being empty.

 

Yep, awesome machine that can produce portrait quality images on a few types of media, but it's only good for indoor or very short term outdoor. I wouldn't even give it a year outdoors.
For most sign and graphics work, it can be overkill in terms of the quality of print.

Havin' fun,

Checkers

 

I saw it at MAC world last month... Nice indoor printer... However you need $$$$ coated Media $$$$ I would not use for outdoor unless on a temp. sign