I have not worn it for long so should not expect too much yet but I still keep tripping myself up on expectations from traditional time keeping when wearing this #DecimalWatch, e.g. I often interpret the half hour markers as 30, rather than 50 or when it is 10 mins to the hour I assume 50, rather than 90.
I also find myself doing quick (rough) calculations back to traditional time. Again, this is to be expected at the begining as I lack the frame of reference for decimal time.