It is a $29 controller card, with a dog slow SIS chipset, that apparently ships with an outdated stripped down BIOS. Read some of the reviews Wow, I did not realize there were so many ways to describe a genuine piece of crap without actually saying it.
You would be better off using the integrated intel stuff. I use something similar to that card for my optical drives and I would not trust my data on a raid with something like that. If you want hardware raid you have to spend $$$ and by the time you add it all up you might be better of with an SSD if speed is what you're after.
But sometimes hardware RAID is an undesired feature. If you want a safe system you may want to use OpenSolaris ands ZFS. If you want to ensure stability you may want to disable the hardware raid features as they only cripple the safety routines in the ZFS.