PhD MB.ChB (Hons), FRCR, FRCP, FBIR, is the Professor of Radiology at University of Manchester and has published many medical research papers.

I never do this, but I really just wanted to write with an unsolicited testimonial. 

I run a large medical research group in advanced imaging sciences. I recently started using Scrivener and it has completely transformed the way that I work. It is without any doubt the best tool I have ever used for the compilation of large review articles. Increasingly I am using it for project management as a kind of self-contained intelligent box file.