Oh and confirmation time is a problem...
I'm still waiting for confirmation of some payments because the site I use isn't able to put correct fees and that's really not cool ><
I saw that a lot of people are the delay of transaction and confirmation is the biggest problem for them in bitcoin.
But for me, we can do nothing for it so don't take it as a problem.
So that it can give you somehow a relief.
Yes this delay of transaction will only get worse in the future and will hinder bitcoin being widely accepted by ordinary merchants when other altcoins are way faster and almost instantaneous.