In the original thread, I commented that I had always used top loading rucksacks in the past...I just couldn't get used to the clam shell design of the bag, so moved it on in favour of my more traditional sacs.
i did give it a fair test, taking it on a number of school residentials, including a week playing soldiers with the ACF on "Outreach". The pack was always comfortable for me, it was just the design I didn't get on with.
i did keep it's smaller brother, which I use as an admin bag for Scouts...all those pockets mean I have a place for everything.
Simon