I have a Medtronic 780g and have used it for 6 months. Previous to this I had a 640g for two years, which wasn't a closed loop system. Having been diagnosed with T1 34 years ago, I can categorically tell you a hybrid closed loop is THE best system I've ever used. Within the 6 months, everything has stabilised, so much that my eye sight has improved and I no longer required glasses for driving. Having had the 640g previously really highlighted the effectiveness of the 780g's capabilities. If you're offered it, accept it immediately!