Most roller bags are two wheeled affairs, which is fine unless you are hauling thirty pounds of equipment around Heathrow or some other endless airport. After a while the weight wears on your wrist. The TT 4-sight is a quad wheel roller case. It is easy to glide along most surfaces and fantastic in narrow airline aisles where it can be turned sideways, this is one nimble case. I bought one of these a few months ago, I carry two Canon bodies and 7 lenses in it plus a few other items. One warning, don't let go of the retractable handle on an incline, it will run on you.
I've posted a full review, if you would like to view it go to:
http://foto-gizmo.blogspot.com …-almost-ideal-roller.html
