This post contains a report of what happened using a particular file. If you don't want your own experiences influenced by what I relate of my own experience, don't read.
Well, after a lengthy internal discussion with myself regarding what I have recently learned and experienced with hypnosis, I summoned up a bit of courage and tried this file. I dove deep with an inductor I've been successful with and then let the playlist start the file.
The visuals in the file were adequate for my mind and I had a pretty clear image of her in my head (never saw it "real" though). I felt her come inside before the wake-up sequence, came awake, and after a short period of unreal-feeling adaption, she took control.
I'm not a fanciful person. While imaginative, I am very analytical in perception and could never bring myself to make this shit up, if only because of personal integrity. Rest assured, my experience with this is true. I don't believe this "possession" is antithetical to any religious beliefs I may have held or still do. I know that what possessed me was a character based largely on the portrait of my inner-voices, given form and control through the removal and encouragement of different personality restrictors. What came to rule over me in the half-hour that she held solid control was a part of me I feared would get out. The controls in the file were adequate, but "she" could also sense my own limits on her behavior. She could not do something I felt would harm me in a way I could not deal with.
Now then, onto the meat and potatoes.
Upon waking, I had roughly a minute of questionable consciousness. I could feel her there, under the surface, trying to get out. I didn't fight. It was more like she could not attune to me. Finally it happened. She focused on her hands, felt my body, testing the senses, and started to smile.
This was not any smile I could ever pull off except in comic playacting. This was more the smile of a madman, one who had evil thoughts on his mind. It hurt my face and the corners of my mouth twitched occasionally from the stress. While I could feel it physically, I could also feel the unstable mind behind it.
She laughed, a short, villainous, insane cackle that wasn't quite my voice. She'd do this every now and then through the time she was in control. She was certainly enjoying herself.
She toyed with my body any way she wanted, promising to not allow me to orgasm. She was the embodiment of all of me that is sadistic, and I found it interesting to watch. She wouldn't hesitate to give me some pain, though. A few hard nipple turns and ball slaps showed she had no regard for my body within bounds.
In her roaming she went into the bathroom, and I was blinded by the bathroom light (having been in a dark room). I tried to look in the mirror but it took a little time for her to tolerate it. It was my body, but the sick smile and evil eyes in it were never there when I was in charge. The smile looked ridiculous. The eyes drove fear into my mind. I had let this thing loose in my body.
There wasn't a whole lot of sexual activity going on, really. She played a bit, teased me about my lingering feelings of an old girlfriend, decided I was unfashionably fat and hairy, and we generally discussed in our mind/voice link what kind of evils she could do. She loved to wait for me to think of something I wasn't sure about and then play off of it. She was in my mind, and as such could use that against my reasoning portion. She was always active, observing and plotting, most of which went ignored but proved to me that if I let go completely, she'd wreak havoc.
It broke only about a half-hour in. I regained control and cleaned up the mess. It wasn't entirely unpleasant, but I know I have to be careful. The second time I used it, a little while later, she found my tube of muscle ointment.
Anyway, I'm sure someone will happen along and say I'm just BS-ing all this. I'm not, but believe what you will.