tons and tons of tweakability make you think this is going to be a mondo versatile, but it has a cold digital sound even when you dicker with the filtering options and cross point. No biggie, tis good at THAT sound and that's a useful sound. All the options are great. If I want an out front guitar or analog synth chorus that screams 80s then this ain't it, but for a lot of other applications its the bees knees and its a super low CPU hit. Its particularly good for vocals because of how clear and uncolored it is and the plethora of parameters mean you can dial it onto a strong vocal to thicken without compromise what's good about it.
I think it benefits from being used 100% wet as a send so you can run the wet signal into something to warm it up or dirt it up.... I've popped it into all sorts of mild saturation plugins and like that and on vocals its cool to keep it cold but run it into an enhancer so that only the effect is getting the aphex harmoncis added and the dry vocal is nice 'n clean.... I also like to send to this on a bone dry vocal before I add compression so tis just whatever mild peak limiting and high pass I tracked with