I keep hearing about this thing. Does it really do all the photoshop things? adjustment layers, masks, dodge+burn, all that stuff? and I guess, does it do it well, with big files?

Yeah, that. Opaque means no transparency. Easier to read/work, or see a picture/video without background stuff mixing in with it. But for my non-focused windows, I’m not actively working on those, so rice it up, transparency all the way! (but still add blur to those, just so I can read them if I need to…)

I have my focused window opaque, the rest transparent+blur.