I don’t find it implausible that it works well (perfectly?!?) for someone. Calling your experiments worthless is pretty rude. Telling you what YOUR basal and ICR settings should look like is beyond insulting. I think this thread pretty much sums up the frustration of the auto mode for someone with near normal glucose control.
For most people, who have high A1c’s and tolerate 200’s well, I have no doubt the 670 is a godsend. For those used to normal bg control, it seems that the inflexibility of the system can frustrate to no end.