Strange. It takes me 5 minutes to install new Umbraco site, in 2 hours i managed to create standard portfolio website (well, when I've already got used to XSLT). It's very easy to create, modify, add custom controls, add smth to administration section, etc.
What was hard to understand (took me half an hour) that I don't have to write any SQL or C# code until I need some additional data model that's above Documents concept or Umbraco capabilities. Such samples: auto-resizing pictures, invoking some web-service, etc. - anything that comes from business logic layer that can't be covered by CMS model.
In most cases Umbraco is so easy to use that even that little bit of documentation is enough. There's pretty thin and easy API provided by Umbraco, but there's a good tech. level needed from developer, and that's XML 1st of all: XQuery and XPath to use maximum of XSLT.
And once more about installation: I just followed each step of installation guide and that's all.
