First of all I have to say that's a great review with great photos.
Now I have to say I'm not thrilled with the actual product. Ammo boxes and water cans abound - and as you say, with better detail. As for the chemical barrels and oil barrels, I must say I have several of the Pro Art Models sets, and they're far better. As a plus, you don't have to eliminate any seams.
Also, as stated in the review, those chemical barrels are oddly shaped as well.
I actually used these very 1:1 barrels for rainwater collection systems in my own and a few neighbors' houses, and again, the Pro Art Models have a much better profile.
Again - Review: Great Product: Not So...
Just want folks to know the options in case they are unaware.