I set mine to the exact time as delivered by 1711. I correct back once every few months.
This is for peace of mind for the purposes of catching last bus, tv shows, etc, since I know exactly what time it is.
However I find that 1711 is not accurate to itself. e.g. I manage to set to the exact time to coincide to 00 seconds on the minute, but then it will be off by a little bit at 20 seconds. I listen for one or two minutes more and it is still exact at 00 seconds and off at 20 seconds... maybe it is my watch that has problems.. :think: