I used them. Lots of people dislike them, so I picked them up in swaps or preloved quite often, and was never fussed about the brand, they all do the job!
I didn't use them til she had solid ish poo though, as they're pointless on newborn runny poo (it sits on the liner then squishes out, not nice). And once they were properly solid, I stopped using them.
Regardless of using them or not, I never found staining a problem. Poo washes out, the nappy gets clean. Very rare stains that dont wash out, usually sun out easily.
As so many people dislike them, it'saybe worth just getting one roll, then if you dislike them it's not a waste? I also made my own fleece liners which did the job well too.