Hard to take it seriously when they start off by suggesting that the web server, by itself, makes it a good investment. I have nothing against IIS (I think handlers written in C# is a solid feature compared to the alternatives for other servers)...but at best IIS is as good as many free alternatives. Maybe they mean within the context of ASP.NET hosting, but they really should make that clear (and if so, say how, exactly, it's better for ASP.NET).