Default column value - Event Receiver

Hi Deleted,

Which version of SharePoint are you using? As you are talking about event receivers I'm assuming that you are using SharePoint on-premises.

I would be interested to see what the isues were with workflows. 

Event handler will fire reliably however you should take into account some potential issues. 

When change to items are made by the system account then you will find that neithr workflow nor event handlers will fire. Your system account is the account running the application pool of your SharePoint web application.

Also, when you are handling events you want to be careful. As long as you disable the event firing while you are dealing with the event then you should be ok for an event to fire only once.