After using this Plugin for years on every master i did, i might as well share a bit of my oppinion towards it:
This Compressor is on the clean side so if you were looking for more color for your sounds, i suggest you look somewhere else. And that is exactly why i love ReaXComp so much. It's the same with Cockos singleband compressor ReaComp: It's very clean and exactly working and can do everything you would want it to do.
In ReaXcomp you can even do ratios going direction "expander" which i think is an amazing detail.
It uses very little CPU over here and my system is really slow. I guess thats because its not emulating anything but is only calculating the volume changes.
There is all features i would want in there like: feedback detection, auto-release, freely definable bands, changeable Kneesize,.
Finally i can't see a better free Multiband Compressor out there, even if i had money i wouldn't consider buying one when there is such a good one like this.
Funny to see that noone else has ever "reviewed" this one, i hope i'm just a starter for more (and better) reviews :) I guess quite some people consider this a "secret" weapon, but i can easily imagine more people falling in love with this one...
Oh and i LOVE the input-output meters!!! well so i do in reaper in general :).
I could understand that some people addicted to using fancy GUIs are scared away by the looks of this one but thats their own problem i guess...
whenever i want to use any plugin as multiband (say preFix gate for example) i just use a splitter like the one in the JS Libary of Reaper or as VST there is FreeSome by de la mancha, and then treat the audio as wanted and later sum them up again. In reaper you need to set the audio-track to multiple tracks in the sends/receive window.