Worth reading, but unfortunately many old examples and references

I was very much concerned to learn what usability and their tests. The book is written simply and clearly, the text formatting (also in color) is Top.

A bit annoying are the still very old examples. Although the author expressly points to do not have this update anyway by the level of my "reservoir of goodwill" sinks.

In my opinion, much more serious are the many references to defunct sites.

Nevertheless, I am very satisfied with the book and can it really only recommend it!