When comparing WinDirStat vs Rapid environment editor, the Slant community recommends WinDirStat for most people. In the question“What are the best power user tools for Windows?” WinDirStat is ranked 12th while Rapid environment editor is ranked 24th. The most important reason people chose WinDirStat is:
GNU Public License (GPLv2).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free / Open Source
GNU Public License (GPLv2).
Pro Color codes by file type
You can sort the list in the extension column (file type) globally or from parent folder selected. This is very helpful in case there are files of a specific type that you may not be aware of that's taking up too much space. Also, the colors correspond to the visual section.
Pro Lightweight
Pro PacMan Progress Bars
Pro Warnings
Displays wrong entries in red, e.g. paths that do no longer exist.
Pro Easy
Editing of Windows environment variables is easy, splits long lines.
Pro Resolve variables values, make easy a refactoring of PATH by extracting different elements in their own new variable
Pro Convert variables between verbatim and expandable
Windows supports referencing variables within variables, but only if they're marked in the registry as expandable, and conversion between the two types is exposed in the context menu for each variable.
Cons
Con Slow
There are faster programs.
Con Classic UI
interface are old and cluttered
Con Treemaps can be confusing to some
Con Simple
Some may not consider it a "power" user tool.