These open source projects, written by people who actually have Type 1 are light years ahead of doing what I want a closed loop system to actually do. The medtronic 670 is so unusable. I can't say enough good things about OpenAPS AAPS (android) and Loop(iphone). For those living in the US, we are forced to use a very old medtronic pump because it's the only way with a programatic means to control the pump's basal and bolus actions.