basically you plug it in, and you win. at everything.
but seriously,
theres an input level, which you should keep around 2 o clock, and match the output level to whatever, I recommend putting it near to the beginning of your chain, the reverse setting with the mix on full (or "non linear as they call it ) is awesome with the mix on full, and plate 3 and 1 are awesome.
the other effects are meh, I'll own up to the fact i've never actually tried them, the hall reverbs are nice too, but i dont really use them. When i get a superfuzz and HM-2 im going to move my muff infront of it so i can use plate reverbs properly.
you may want a true bypass loop if you want to turn this thing off, or turn the mix down or buy the ####ty bypass switch they recommend to plug into the back
it is definetly the most "shoegazey" reverb out there. you will love it.