Dr. Heinz Kabutz has been an avid user of IntelliJ since 2004. He started programming Java in 1997, just before version 1.1 was released. Initially this was done with Borland JBuilder, MS Visual Studio, vim and Rational Rose. After JBuilder, he spent a year using Eclipse, before trying out IntelliJ during a new project. After a thirty day trial period, Heinz was completely hooked and bought his first license. The most valuable parts of IntelliJ are that it is just so usable for developers (CTRL+W, CTRL+X on a line, etc.), that the code analysis can automatically fix poor code and that the smart auto-complete picks the correct methods.

You can see his work in action at: www.javaspecialists.eu.