I love my Molly Mac Pack. For me it is just a good lightweight alternative that I can take as much or as little as i want. My packing is pretty standard with the dry bags on the back and a few of the different pouches on the belt.
I have a few longer walks planned so intend on getting the front panel, to add to it.
My use is pretty standard, but given the way it is constructed it's use is only limited by your imagination.
The build quality and service from Mac I have found to be excellent. Plus it gets people talking - well at least here in Tasmania.