I am beyond furious with Medtronic. In the past month, I have needed a replacement pump and a replacement transmitter, due to failed tests that warranted overnight shipment of the respective replacement devices. Both times, Medtronic has completely messed up shipping twice for each device due to shipment error. For the pump, the pump just "didn't make it on the UPS truck" and they said they were "sorry". The following evening I go and check my email to find that they shipped the pump to the wrong address, which I had to immediately resolve. The most disappointing part about the pump error was that it was a button error, so I had to go back on shots. For the transmitter, it was continuously giving "weak signal" alarms and failed the "test plug" test, therefore the transmitter was defective. I called Medtronic on a Friday night and they said that a new transmitter would be there on Saturday morning. Saturday morning comes and all I get is a metal canister to ship the defective transmitter back in and a USPS shipping return label. Needless to say I was furious. I called Medtronic and I actually had to convince the customer service rep that they were supposed to ship me a replacement transmitter initially as the transmitter was under warranty. She said she shipped a transmitter that would arrive on Monday. Well, it's Wednesday now and I have still not received a replacement transmitter. I called them today and was told that the UPS shipping label was created but the transmitter did not make it on the truck. I have been a Medtronic customer on-and-off for 8 years now, and they have routinely messed up shipments like this over the years. I find this completely unacceptable, and to me, it's the "dog ate my homework" for a medical device company when they mess up shipments. They have left me in the dust. If they cannot properly ship things on time, which results in further disruption of treatment, then they cannot expect me to be their customer. In addition, my pump warranty and transmitter warranty both expire in August. I was thinking about replacing those with an identical in-warranty 530G, but this series of incidents leaves me no choice but to consider competitors. Medtronic has left me in the dust. For T:Slim users and Dexcom users, how do you like the devices? How is the customer service?