Notifications are not suited for alarms

[humdingerb]

Since system notifications cannot be made "sticky" (yet), they are easily missed. Until then, it's better to pop up a window (alert).
Or, how about changing the note's background colour to an alarming red?

[thaflo]

I personally don't like popping up windows ... So I changed the alerts to notifications.
Your second propose is okay for me!

[humdingerb]

I'm normally with you on needless alerts. In this case, however, we wouldn't want to miss the short lived notification while not looking for a few seconds. Changing background is the best solution IMO. I'll have a look at doing that for DeskNotes, TakeNotes' competitor. I'll have to sort out the localized time input first though... if I find the time... :)