I can't imagine flying without my Nalpak Tuffpak. I pack my gear in wrapped in all my clothes as cushioning. Mine, when fully loaded (takedown bows) falls under the max requirements for every airline I've flown on, domestic and international including SA Air, and it is about as indestructible as you could ask for. It is also very unobtrusive; if they ever ask it usually goes "What's in there?" "Sporting equipment." "Any guns?" "Nope." And away you go.
Mine has been a great investment. Terry's cooler has worked well for him for many years...but I'm not as lucky as him so I'll stick with my Nalpak.