Yeah, it's been awhile for me too, but I remember the shh part always drove Spencer nuts so I used a fan for some white noise and patted. Then it progressed to just a hand on the bum, but I did use it for a long time (I guess until 16 months and she was in a BGB, so then I just started laying beside her - thank goodness NW are rare as it is only a crib with the side off!)
I know for a fact that even at this age, with her touchy/spirited personality that WI/WO would never fly, in fact I didn't ever bother trying PU/PD because I just knew it was not going to work for her.