Native Instruments really shocked with this too-good-to-be-free compressor. This is probably the best "one-knob"-style compressor since Audio Damage's Rough Rider (but without the high-cut), and one of the best compressors you'll try this year.
What's really wonderful about Supercharger is that it gives you some control over the sound, including the all-important wet/dry mix, plus saturation and "Punch" modes. The Punch mode is reminiscent of Cubase's Vintage Compressor's punch mode, creating a very sharp attack, similar to a transient designer. The saturation is typically pleasant and well-suited to bass and drums.
Overall one NI's best offerings, at one of their best prices! $49 is more then reasonable for this little powerhouse, and for those who were paying attention last Christmas, they got it for free. Amazing.