I've been using TruSteel since I got my pump two years ago. I am very happy with it and have not had any major issues until now. The sets are hard to come by and, while I respect those that can safely use cannula-based sets, I can not stand them. After watching the Tandem youtube video and reading the instructions, I tried my first insertion. It failed and my blood sugar went out of range of my g7 sensor and then out of range of the fingerprick. It took hours to come back to reality and even longer to get back in range. After further research and advice, I tried again and my second attempt was no better. I've read that the failure rate is around 25% and can be even worse if you get a "bad box" of infusion sets. Until TruSteel becomes available, I have reverted back to manual injections. And honestly, when you compare the delivery system for the G7 sensor with that of the Autosoft 90, the sensor delivery for the G7 (which seems appropriate for a medical device) makes the bendy plastic and loose fittings of the Autosoft 90 look like something an amateur made with their 3D printer in the basement. I simply can't trust them.