Digital BW, The Print

Has anyone had B&W printing experience with the breathingcolor.com
line of fine art papers:

Sterling
Sterling Platinum
Sterling Rag
Sterling Rag Platinum
Sterling Platinum
Elegance Velvet
Elegance Textured
?

I am using an Epson 4000, the Neutral K7 inkset, and QTRip.

These papers seem to be very reasonably priced, and the manufacturer
makes some sensible arguments about their quality, archival
durability, and dmax attributes.

Thanks. AK