Responding to the last poster: I'm not going to rate this, as I use Firewire ASIO not USB. However, $55 is really nothing for this kind of software if it achieves the claimed latency. This with a USB box is still much cheaper than the money I paid for my Firewire MOTU 828. Admittedly the 828 has many other advantages and I wouldn't trade it. Nonetheless, this offers to bridge the gap between cheap USB hardware and decent performance for a lot less than the cost of the alternative.