My son has had diabetes going on 5 years now. We have been pumping for 4 of those years. Had the Deltec Cozmo (and LOVED IT!) until September when we took advantage of the Medtronic trade in deal. Since switching to Medtronic we have had nothing but problems. Unexplained high blood sugars and ketones. We have tried 3 different types of infusion sets, most recently the Sure T's so we could eliminate the possibility of canula issues. We even got a different pump, recertified again, from Medtronic and had the same issues. Anyone else who took advantage of this offer having problems with recertified pump? His A1C has went from 6.9 to 7.9% since being on the Medtronic. He has missed LOTS of class/school b/c of the blood sugars and ketones. Went off the pump earlier this month and back to MDI (Lantus and Novolog) and blood sugars have been BEAUTIFUL! We have trouble shooted EVERYTHING! Endo and NP's are baffled, and so is Medtronic. HELP! Want to return to pumping but don't trust the Medtronic pump.