Since I bought my One I've had map version 6.5, 6.65 and 7.1 and it seems that (for me at least) 6.5 is still the most accurate. The two most recent maps have roads missing or in the wrong place that were fine in 6.5. After about a week of using the updated maps I find myself downgrading back to the old version. I'll still upgrade when a newer version comes out but I'll be keeping 6.5 handy just in case.