One of the hardest diabetes related things I've ever had to do is break up with my insulin pump company. In case you've missed it, I've been rocking the brand new Medtronic 530g system for exactly 30 days. Unfortunately, the new Enlite sensors aren't working for me especially since I've already experienced the amazing accuracy of the Dexcom G4 sensors.
The brief recap:
Ease of sensor insertion
Adhesion of the sensor
Low glucose suspend
Sensor accuracy (and therefore low glucose suspend)
My recommendation: Only use the system if you're comfortable with MM's CGM tech already. Otherwise Dexcom rules.
For the full (and lengthy) read on my 530g thoughts, check out the whole post at http://climbingdiabetes.blogspot.com/2013/11/the-hardest-thing.html