If this is not the first PCI Express-SATA card, Sonnet was the first one the release such product, it has the advantage to be a model allowing booting when installed in a PCI-Express equipped PPC-based Mac. If it will also work in a Mac Pro, the bootable feature will not be available for the time being, but it will support waking from deep sleep mode as well as SMART status of HDs.
As usual with tests published by the AMUG, this article is a "must read":
http://www.amug.org
