I tried them when they first launched the larger sizes.
They hold 1 wetting at most, and the taped seams start to leak after a dozen or so washes.
Also very hot to wear as the whole length of the PJ pant is waterproof, the padding stops just over the knee.
Appearance wise they are very obviously "special" as the taped seams are quite visible. A pair of superundies overnights with normal pajamas is much more discrete and effective.