Many of these files haven't worked at all for me and the cursed plugs one only had brief success. This one worked straight away though.
As soon as the file had finished I felt a tickling around my vagina, which got stronger over the next hour or two. The effects on my anus and nipples were negligible but the feeling in my vagina was very strong. As the tickling feeling turned into an itch, I tried rubbing to see if it would go away, but it did in fact make it worse and not gradually either. Almost as soon as I touched myself, the itch spread deep inside and turned into a burning sting. My partner was busy at that time, so I tried masturbation, which again turned it into a burning sting.
Eventually we got to bed and he decided to torture me a little, teasing me and not penetrating me. An interesting side effect of the curse comes in here, I orgasmed from oral sex more forcefully and a lot quicker than I would usually. When he did penetrate me, the itch did increase to almost painful levels. This is not something included in the warning, so take note ladies - it gets worse during sex and the only thing that can stop it is to be filled with cum. This is not as technically accurate as it might be, you can use a condom, we did and it stopped once he had cum regardless of the barrier.
I am going to keep going with this one for the moment. The fact that it's permanent phased me a little, but I don't for a second believe that they keep going if you stop listening and "choose" for it not to be there.
Anyway, there you go. No-one had posted on this one, so I thought you might be interested.