As you can see from the screenshot, I put a map comment on grid A where a sentry sits (The garrison nearby makes me want to avoid fights here). But later I accidentally opened the door at grid B while failing to see the marked grid A.
Of course, grids with comments are purple and flash gently (4 seconds interval?). But I still find it easy to miss it. Two things would make the map comments feature even better for me:
* An option to configure the flash mode. (E.g, 0,1,3,5 seconds interval; 0 = no flash)
* A key (E.g, 5) that display all map comments in full text in view. (Yes, I am aware that space + C already does that. But it is not compatible with mapshift mode)
The first point makes grids with comments more visible for players. The second point gives players an option to see what the comments are.