Comes with a dedicated master compressor and reverb tailored for drums.
The Rack Extension version is generally considered much faster to use than the older ReFill version because all controls are on a single interface rather than buried in sub-menus. Reason RE Reason Drum Kits [WiN]
Requires Reason 10.1 or later to run as a Rack Extension. Comes with a dedicated master compressor and reverb