The assembly instructions were well illustrated and in color. The Tri-Wheel assemblies are very sturdy and I believe the 460 pound (on level) rating and 330 pound load rating on stairs. It's sturdy but, even with the handle fully extended, I had to bend at the waist to pull the cart up my porch stairs (with several cases of bottled water) , which is hard on my lower back. In the end I found it better for my back to just bring them up one case at a time manually without the cart. The cart is great, just too short for this six-foot guy. It would fit a 5 ft 4 inch person very well, I think.