that's all Skype is, HYPE. It's a proprietary closed protocol and it locks you down to one provider where you have zero flexibility to shop for rates.
This box is ridiculous, it's like everything Skype, it requires a PC with an unstable operating system (Windows) to sit in the middle of everything. I, and several others, have been using devices such as the Sipura SPA-3000 to do this same thing (bridge to a standard phone line), WITHOUT a PC involved for some time now. Why does this new "wonderbox" seem so great to people? Once again Skype=Hype.
The setup with the Sipura SPA-3000 served me well for over six months of international travel, without intervention. I'm confident that if there was a Windows PC involved this would not have been the case (not to mention the cost to power a small SIP device 24/7 is orders of magnitude below an entire PC).