Does not work that way, the F purser actually stood outside the toilet when I changed inside, when I came out, she took my PJ immediately away. Even I begged to keep it, can't.

The PJ is indeed nicer than the PJ given in SQ F, nice material, traditional Japanese style. The cardigan is totally worn (with little cotton balls on it), that one I am more than wellcome to return. But as others said, I find it very cheap that even in F, you couldn't keep it, that was happened on my flight IAD-NRT-IAD back in late august.