Comment by slg

This is a very interesting idea. However I think the ordering process for this highlights a crucial problem with Bitcoin, instability of value. They aren't planning to deliver the device for four to five months. Using the last four months as prediction of future fluctuation in Bitcoin value (insert usual caveat about past performance predicting future performance), the more expensive version of the device could cost anywhere from $100 to $700 USD when you actually receive the product.