Frankly, I'm surprised they can charge money for these. Any of the higher-end NICs from Intel/Broadcom do almost the exact same things, except for the value-add software installed on top of everything. Which, I might add, can be covered by other software apps that are usually free. If you go into the advanced NIC properties for Intel 82xxx and Broadcom NICs, they expose a lot of the options you can tweak to do the same basic thing this one does.

Of course, I'm just talking shit without ever owning one. I still think it's snake oil.