For us, that isn't an option. The money part is fine, whether we pay a little every couple of weeks or once and be done. The "convenience" for me, is that I know the items are safe and
*not in my house*. I have very snoopy kids, and there's not much space here anyway. I put up the tree on the 16th every year (DH's bday is the 15th, and he grew up in a house that "shared his bday with Christmas. I swore he would always have his birthday while I'm in charge!), so the presents come home, get wrapped, and are under the tree. I have room to hide Santa presents; just not everything for everyone. Haha. I usually go to kmart for this since they offer it year round - makes getting presents for birthdays easier too.
Anyway, just wanted to pass along another reason for layaway besides the "forced saving/spending" side.