It's not too bad. Aluminum is just about the exact same weight as steel for equivalent strength and that is high quality Aluminum and weld steel so a cheap welded aluminum box that weighs less is weaker by the exact ratio of the weight. If the Aluminum box was high quality 6061 it would be great but the fact is it was welded so it ain't. Only downside of the Tuffy box is I have to take it out and clean up the rust and paint it every few years. Tuffy stuff is top tier, if aluminum was better they'd use it. They know the math.