The wireless radios in routers deteriorate and should be replaced every two years. The ones on your device deteriorates too, but not as quickly because it's not constantly in use like a router's. I will not be buying one of these as I consider these to be infrastructure and infrastructure should be built to industry standards so that it's easily maintained by swapping components.

The privacy concerns bug me, but what bugs me more is the prospect that my lifestyle might start relying on a product that the company putting is out has a nasty tendency to discontinue when it's no longer convenient to support. See: Google Reader.