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.

An example of quick calculations being that 1 décime (10 decimal minutes) is pretty close to 15 traditional minutes (actually 14.4). Thus you can do things like see two décime markers as rougly half a (traditional) hour or four as one (traditional) hour.
Although I would sometimes prefer not do this and to instead just accept and get a feel for decimal time directly, I am still ok with it. You cannot totally get around this. I am always going to need to do some calculations to work with this in a world run on another system of time. Similarly I realise I will slowly have to memorise many equivalents to common times throughout my day, e.g. in Norway it is common to have lunch at 11:30 which would round to roughly 4:80 in decimal time.

In a way, although occasionally annoying, it is also part of the joy of this. To make me think. Learning to tell and work with time is something most people do once and then it becomes second nature.

One of the reasons I enjoyed my binary watches was because they forced me to think differently and learn and notice new patterns.

I suspect that thinking about time in new ways gives you a better understanding all around, much like learning a new language gives you insight into your mother tongue.