For those who are on the fence. Here's my unboxing video. See what it looks like in video and what you get before spending a dime. The iDSD gets an A+ from me!
I created a high quality usb transport for my idsd nano. It is a Paul Pang usb cable > iusb power > gemini cable. This chain improved the SQ of the nano quite a bit. I was surprised to find that ifi changed the input connector on the micro from a USB B female to a USB A male. This meant I had to use the rather generic B to A adapter supplied. That being said, I still found the SQ to be better using my iusb chain than with their supplied USB "A" cable.
I have since upgraded the B to A adapter with this: http://www.lindy-usa.com/usb-30-adapter-71277.html
The new USB B to A adapter is a much better built 3.0 type. I am getting a slight SQ boost in detail and punch from replacing the adapter provided. I recommend this to anyone using the one provided by ifi. It is only $10.
Is the iusb power worth the investment with the micro? That depends. With the addition of a gemini cable it is almost $400. It is hard to recommend that for the amount of SQ improvement, but I'm keeping mine.