The Luggageworks bags are indeed the heaviest but unlike all the other great bags, they glide effortlessly over the terminal floor and are rock solid stable platforms for towing your heavy flight case. I always chuckle at seeing flight crew with other bags wobble and topple all over the place. The stainless stell handle is long, and will never flex. Virtually all other bags, incl. travel pro, are not as nice for towing your bag... the wheel base or whatever- the distance betwene the wheels- is very wide on Luggageworks so your bag will never wobble, and the hook arrangement is easier to use. Once in a blue moon (happened to me once in a few years) it gets bent if the bag is piled in the luggage bin with 10 bags on top of the hook, but any airplane mechanic can fix that for you in 5 seconds with one of his reverse plyer thingies.
As for flight bags, if you have access to a StopOver store or some other place that does luggage repair on the spot, you can get the flimsy pins that secure the handles in the office depot bags replaced for around $15 with beefy pin that will never break. That pretty much results in a $45 bag ($30 + $15 for the new pins) that will last for many many years, since that is the part that breaks. (Even if the handle eventually gives way through the pins, that would only cost another $15). And as someone else said, that way you can get fresh stickers when you change jobs.