How I wish the personal Freestyle Libre were authorized for use in the USA. I'd seriously consider getting one even if I did have to pay out of pocket.
During a period when I felt my BG had gone out of control completely a couple of months ago, my endo let me use a Freestyle Libre Pro from his office for 13 days. It didn't allow one to read the results in real time, only to get a printout from the endo's office after the 13 days were up. But in spite of the fact that I'd had some major changes that affected control, it turned out that I was in target 91% of the time, above target 2%, and below target 7%. It was set for a pretty wide target, though - from 70 to 180 mg/dl (3.9 - 10 mmol/L).
I've since learned what caused my BG craziness, have dropped the offending OTC medication, and my I:C ratios are back to what they were previously. But in spite of the fact that I'd had an A1c between 5.5 and 5.9 for over three years prior to the BG craziness and think it will likely be back to that level again now that I've removed the offending OTC, I think having the Freestyle Libre would give me better control. I'm sure I could cut the variability a lot and shorten any daytime hypos.
I'd certainly not be satisfied with only 60% of time in target, even though your target range is much narrower than mine was. But so much depends upon the individual's situation. I'm elderly (75), and rarely do exercise that could cause major BG problems. If you are a younger woman dealing with monthly hormonal cycles or a younger man who is a triathlete, for example, there is no way you could expect to achieve as much time in range as I could. So much depends upon circumstances.