I use it for years already and here in Belgium it's more a generation issue, not so much a trust issue.
Older people will never use it, but I think 90% of the "younger" generation almost never see a bank from the inside

This year I even didn't see my bank.... If you have internet and a electronic passport...there is really no need anymore to go outside...
Only problem I see is that the banks first billed you extra when you didn't use the online facilities, which were free in the beginning. That way, more and more people started to use the internet and the banks started to fire lots of their employees...
Now that the balance is going to mostly "electronic" banking, and there is no one left to fire, they started to charge for all those "electronic" banking methods...

and I really hate it to have to pay to get my own money...

After all and like always... banks always wins.