Straight from the NVELO DATAPLEX web page:
"Dataplex continuously monitors the way "you" are using "your" applications and data, and automatically keeps those files ready on the SSD for optimal performance. In a typical PC configuration, Dataplex delivers SSD-level performance by using as little as 32GB of SSD as a cache for your existing HDD. Finally, a single drive letter that delivers SSD performance, HDD capacity, and no data management or migration tasks for you! Simply plug and play!"
NVELO also claims their DATAPLEX software works with any ssd and any hard disk drive. The software must be purchased through a vendor.
I am not surprised that a SATA 3 6Gb/s ssd operates at or near SATA 3 levels - providing the cache contains the applications and files to be used.