I'm a WN addict. Love the OS and SS, though I've started replacing my OSs with SSs (not entirely sure why
, as I like them both!) ...
I say this all the time, but have you tried giving your PBPDs a spin in the tumble dryer to seal up the seams? It's worked magic for me in the past with leaky pockets and wraps, and I've always found PBPDs pretty reliable!
ETA: forgot to say why I like the WNs... overall look, quality of craftsmanship, LOVE minkee (seems more comfortable, Lili sometimes complains with PUL outer pockets!), and most of all the super-trim fit. PBPDs and Upsy Daisys have a bit more of a bubble-butt look to them, but WNs are super trim, I love it. Also quite reliable.