Its an adapter that you mount and plug your SSD into a PCI-E card. It's like 30 bucks but will there be a tangable benefit from actually using a product like this? or is that Potential Bottleneck from the SATA interface still going to be there?
This is effectively an add-in SATA controller that you just so happen to be able to mount a drive on. There is a big difference between PCI-e based SSD's and SATA and the controllers on them. You can't magically by pass the SATA controller in the SSD to "unlock" its maximum potential.
It will be an PCI-e SSD but it will only run at SATA speeds. Not only that but it is on a "PCI-Express with transfer rate 5Gb/s Full Duplex channel" which will be slower than actually just connecting the drive to the SATA on the board. (providing you are connecting to SATA3 (6Gbps))