Very magical to hold your watch up to the CRT monitor, see the monitor go black and flash a bunch of white lines for a few seconds and then look at your wrist to view the downloaded info.
But it was only letters and numbers so the routine got old fast.
Could be a bit finicky to get a successful transfer as well.
And transfer bandwidth was pretty low.
IIRC it didn't work with a CRT using MS operating systems after Windows 2000 due to driver changes or something.
But Timex also a sold little single-LED blinkenbox that plugged into an RS-232 port that would do the trick. That was intended for computers with LCD screens like laptops, but it worked with later operating systems too.