I have a box of 8 1/2X11 Colorado fibre, and am generally very impressed with the quality on my 3800. Definately a wider gamut, roughly similar to Hahnemuhle Fine Art Pearl (different, but similar) I have printed the same image on Colorado, Fine Art Pearl, and Epson Prem Lustre... There are differences, but at a distance, or under glass you have to look closely to see them. Colorado has a somewhat intangible quality to it that I have not yet seen in a digital paper. Images printed on it have a depth (an almost 3-dimensional quality) that is a bit reminiscent of Cibachrome (I don't know how else to describe it.)
I ordered this box directly from Moab; my local Canadian retailer (Beau Photo in Vancouver) says that Moab has recalled virtually all of the initial batch, which explains the lack of availablility, I suppose. The paper I have suffers from really extreme curl problems: no amount of reverse rolling or coaxing will flatten it. It caused rather heart wrenching head strikes with the 3800 until I hit on the idea of feeding the paper in the landscape orientation (the curl is only in one direction around the portrait axis). I simply created a custom paper size, (11 X 8.5 rather 8.5 X 11) and the head strike problem is gone. Clearly ths is only a workaround until Moab fixes the curl problem. Also, rolls won't be available for another 4 to 6 weeks, or so I am told.
Once these initial problems are fixed I imagine I'll be using a fair bit of this paper.