A few years ago I built a simple electronic prototype for C10 clock at home for testing. It is amazing how on the third day one can really start thinking "...it is 33 o'clock", obviously we are 1/3 into the day. "55 o'clock" is time when people usually have their lunch as just after half into the day, "75 o'clock" - people normally go home after work, "90 o'clock or later" - time for bed. I tested the system with my two kids (5 and 10 years old at the time) and they needed just a few words to understand it! Now, how many books and pictures have been made to explain to little kids how current time works?
Another good thing about C10 is the actual length of its base measures: one interval takes about 14.5 current minutes – long enough time for everyday use, but far not as long as the hours in a 10-hour day. One centival refers to about 8.5 current seconds – very convenient for referring to short events in the everyday human life. One tick – a very short time, good for scientific use.
Of course it is way too optimistic to assume that everyone will happily just accept a new time system in matter of days. In the most favourable estimation it may take up to a century for such a change to happen. Various ethnic, religious and even business groups may strongly oppose to any change at all, so a change must start from the children. If the very young people adopt and understand a new way of measuring the time, it will eventually be passed on to the next generation, to the one after it and so on until one day fully adopted.