My wife is a t1d and has the same pump. It sucks their support staff has no idea how the thing works or what its failure modes are. My wife once had her x2 tell her it gave here a 40 unit bolis out of the blue . This would have killed her. While in the er support from x2 said something like "there is no way for it to do this .. you must be wrong.. are you reading the display correctly .." All in all the x2 plus dexcom was supposed to be a closed loop cgm plus pump. It rarely cuts insulin delivery on low blood sugar, or it does it way too late to matter .