I was put on to it from a youtube video and it allows you to dial in the right settings on certain plugins that different behaviour at different gain stages in a VERY easy way from a workflow perspective.
It allows you to link and reverse two gain knobs.
For example, using it with my ATR-102 on the master chain, and the ATR doesnt have a very easy way of dialing in the right input like the Slate VTM does. Now that I’m on the ATR, thats the only thing I was missing about VTM.
Throw a blue cat gain in front of the ATR, throw one on after, link them and reverse the second one and voila, dial up 10db on the the first BC gain, 2nd BC gain dials down 10.
It is great. I use it quite a bit because of the linking. I can put it across the top of the channel strip and bring down ALL channels -18db without every touching the faders. I like to do this to get the levels down so that I am at around -18db for the Slate plugins which work well around there.