In reply to sean1:
I have a huge TNF one purchased in 1998. It's still going although it has a few scrapes on the backside these days. It was expensive (?100 quid) but it has worked out to be about 6 quid a year....
It hasn't had excessive use, just the usual planes / trains / cars / buses rather than camels and ponies, to be fair, but it goes right round the globe on a regular basis and even LA baggage handlers haven't managed to break it yet.
It does have (handy but totally uncomfortable) shoulder straps that can be put on it when needing a longer carry, a useful feature when changing terminals in Heathrow with more large bags than hands.
I also have a Berghaus wheeled thing and it's a dog - poor design (can't stand it up, for instance), mediocre build (zip pulls pull off) and the handle refuses to stow when you want it to, usually at the head of the check in line. Not going to be buying much Berghaus stuff again...
b