Review of My Experience with the Medtronic MiniMed 780G System (December 2025–May 2026)
I switched to the MiniMed 780G insulin pump system in December 2025 after significant effort coordinating between Medtronic, my endocrinologist, and insurance to complete approvals before a January 1 insurance change. Unfortunately, my experience since then has been overwhelmingly negative and has involved ordering issues, poor communication, technical failures, sensor reliability problems, billing frustrations, and major customer service shortcomings.
Ordering and Onboarding Problems
Although both the pump and Abbott Instinct Sensor were approved by insurance, Medtronic shipped the pump without sensors.
Only afterward was I informed that the sensors would not ship until I personally completed a software update. This dependency was never disclosed during ordering, despite repeated communication that timing was critical because of the upcoming insurance change.
The onboarding process quickly became another obstacle:
Software update attempts initially failed due to server errors.
The App Manager device and phone integration process were difficult and unreliable.
Technical support required escalation.
Significant time was spent troubleshooting a brand-new device simply to activate features that should have been ready at delivery.
The local representative was attentive during the initial sales process and first pump demonstration. However, responsiveness slowed significantly afterward. When the sensor shipment problem occurred, he did send sample sensors, which I appreciated, but the assigned trainer never responded and I was never offered a formal training session.
Sensor Performance and Reliability
The Instinct sensor has been one of the most disappointing parts of the system.
Major issues include:
Frequent connectivity problems, especially during the first several days of wear.
Large discrepancies between CGM readings and fingerstick glucose values.
Repeated false urgent low alarms overnight.
Compression lows whenever rolling onto the sensor during sleep or wearing tighter sleeves. I never had this issue with Dexcom G6 or G7 sensors.
Signal instability and unreliable startup periods.
My blood glucose values often vary widely from the sensor readings, making it difficult to trust the system.
The pump also alarms excessively, particularly overnight, and many alarms have been false or clinically irrelevant. The nighttime alarms became disruptive enough that I now regularly disable sensor alerts entirely just to sleep.
Instead of increasing confidence, the system frequently increases anxiety and sleep disruption.
SmartGuard Startup Problems
The mandatory three-day manual mode period before SmartGuard activates was particularly difficult.
During this mandatory warm-up period, my blood sugars ran significantly higher than usual. I felt poorly enough that I scheduled an appointment with my primary care physician because I was not feeling like myself and unsure why. It was only later that I realized the symptoms were likely related to the prolonged hyperglycemia during this startup period.
I like the concept behind SmartGuard and automatic correction boluses every five minutes. It is one of the main reasons I chose this system.
However, that concept depends entirely on having a reliable sensor. If the sensor cannot be trusted, the value of the automation decreases substantially.
Customer Service and Support Failures
Customer support has been one of the weakest aspects of the experience.
Examples include:
Long technical support delays, including approximately ten days waiting for a callback regarding an urgent issue.
Trade-in credit problems after returning my old pump.
More than an hour on hold with billing support, and no one ever came to the phone
Incorrect phone instructions referencing nonexistent menu options. I had emailed customer support about my trade-in credit only to receive a generic reply a couple days later asking me to call their phone number and use Prompt #4, which doesn't exist. 😆
My impression is that Medtronic has declined substantially compared with earlier years.
The technology may be newer, but the support experience has deteriorated. No amount of new technology will restore trust unless the customer service model improves significantly.
Costs and Billing Concerns
Supply costs have also been surprisingly high.
My monthly cost for sensors plus infusion sets and reservoirs is approximately $588.
Even more surprising was Medtronic’s billing practice of not providing cost estimates until after the order ships. I had never encountered this approach before and found it extremely difficult to make informed financial decisions without advance pricing information.
Supply Fulfillment Problems
Another frustration involved infusion supplies.
I believed I was receiving the newer extended-wear infusion sets and reservoirs because those were what I requested and believed I had ordered.
I used them under that assumption.
It was only during my reorder that I discovered Medtronic had actually shipped the standard infusion sets and reservoirs, not the extended-wear versions I thought I had received.
Overall Assessment
The 780G system has ideas I genuinely like, especially automated correction boluses every five minutes and hybrid closed-loop capabilities.
However, those benefits depend entirely on trustworthy sensors and strong support.
Instead, my experience has included:
Undisclosed shipment dependencies delaying sensor delivery.
Difficult pump software update process.
Unreliable App Manager, app, and phone integration.
Sensor inaccuracies and connectivity failures.
Compression lows.
Excessive false alarms.
High glucose during startup.
Missing training support.
Expensive ongoing supply costs.
Lack of billing transparency.
Fulfillment errors.
Poor/non-existent customer service.
At this point, I do not trust this pump and CGM system whatsoever, and I have even less confidence in the support structure around it.
My overall impression is that Medtronic has gone downhill since its earlier years. New technology alone will not solve this or restore patient trust. The technology needs improvement, but the customer experience and support structure need a complete overhaul as well.
TL/DR: I don't at all recommend the 780G system (or new Abbott Instinct sensor) and am switching back to my Tandem t:slim.