The Glue is essentially a superb emulation of SSL's famous hardware bus compressor, with a pretty big exception: because it's not endorsed, Cytomic has been free to include some additional features that you won't find on the real thing.
Of the 'new' features, the sidechain filter affects both internal and external sidechain signals and enables you to roll off low frequencies right up to 2kHz. This works well at reducing pumping on mixes, and at fine-tuning low-end heavy sounds.
Meanwhile, the Mix and Range controls offer some versatile compression flavours - meaning that the plugin is handy for individual instruments as well as the master bus - and the PeakClip option with its associated red LED is useful if used carefully.
Combined with a simple interface, The Glue's great sounding SSL emulation, responsive mastering and flexible extras make it an affordable and justifiably popular choice.45 Stars