670G/Guardian Link vs Tandem X2/Dexcom G6

So I currently have the Medtronic 670G and Guardian Link, overall it's been fine for the most part. Works really well for sometimes but I'd say 1/ 3 sensors stops working a few days early and I feel like it keeps me running higher than it should a lot of the time.

My doctor suggested I think about the Tandem X2 and Dexcom G6. He said a lot of his patients find the combo to be "a superior CGM".

Has anyone switched to this combo or is currently using it and recommend it?