I just read a review of the Freestyle Libre CGM (FB: Integrated Diabetes Services) that states you can dose from it's numbers. Not approved in the USA but looks promising.
Unfortunately can only wear on your upper arm, has no low/high alerts and is not continuously read like the Dex, you must hold up your receiver to the transmitter to receive information at any given moment.
Those three things would certainly make me think twice about getting it, but to dose off a CGM would be ideal!
Any news that DEX is headed that way? Though I am sure that's a long way off. I'm just running out of finger real estate and the Freestyle "alternative" sites are not producing enough of a blood drop for me.