"I use it daily. I have used it for letters of a few pages, and for books of hundreds of pages. Producing a 200 page press-ready PDF with hundreds of figures and tables is extremely simple. Producing a 20 page report takes me about half the time I would take using MS Word because the formating simply takes care of itself."
"The best general purpose graphing and charting package I have come across. Not only does it produce publication-quality graphs and charts, but it takes care of details other packages don't even think about. Documentation is incomplete, but it is still easy to learn."