The overall mapping is rather basic, at some points, overly simple a la HL1 and unimpressive and even newbish. Textures and models are cool. Brushwork and overall design is too damn simple and unimaginative.
For example this in one BUTT UGLY area!
The rooms in de_italy are still as undetailed, flat and unrealistic.
I assume CS:S is just like CS compared to other mods like NS. Simple and modest. The amateurs are once again about to beat the pros.
Nevertheless, CS:S is cool, but could be a lot better.