Instruct: Classify a review into positive or negative sentiment.
Query: No data to speak of = no scientific conclusions possible

The authors claim that their research "provides actual data -- not opinions -- about what makes web sites usable". (Page 1). Unfortunately, their research is so poorly described that their claims are as good as opinions at the very best.To illustrate, we have no idea how many participants were tested in their study (1,2, or 200?) or who they were (college students, web designers, retirees?).In the whole book (all 157 pages of it), we were able to locate only 2 figures (one figure is repeated several times) and 1 table reporting any research findings with data. Various claims about correlations or lack of thereof are not substantiated by any presented data.In our opinion, the book is not worth 2 cents. Your money is better spent on Jacob Nielsen's "Designing Web Usability".