After spending a couple of years dealing with the minimed 670 I decided to take advantage of their upgrade to 770/780 while in warrantee plan. (They charged me 400$ to upgrade to the 770 while in warrantee) The 770 will supposedly upgrade to the 780 when and f it gets approved in the US.
The 770 sill uses the 670 algorithms for automode, but it is far less annoying with far fewer alarms. It uses bluetooth to connect both to my cell and to the new transmitter for the sensor. (you have to replace that as well.) It also uses the accucheck guide link meter instead of the contour meter.
It supposedly will convert to the 780 via a software upgrade, and will be compatible with their next generation of sensors again with a software update.
After about 2 months using it I find that it is a lot less annoying and easier to use without having multiple alarms going off. Nobody at medtronics seems to know or tell when they anticipate it will be upgraded to the 780 or the new sensors for that matter. I still have abut a year and a half warrantee on the pump and this upgrade from the 670 to 770 the has made that time far more livable for me. I will be able to tolerate this until my warrantee runs out. I figure that if they can’t get their act together and get this upgraded and come out with better sensors by November of 23 when my warrantee runs out I will switch at that point. I would definitely recommend switching from the670 to the 770 if you still have a while under warrantee and don’t want to get the tslim or other pump out of pocket.