I remember buying it on a whim and it turned me on quite a bit when I thought of it. I wasn't sure why exactly, but it probably has to do with humiliation and the inherent male insecurity that seems to plague every man with a cock is smaller than 8 inches. I remember when we got it that Mistress was like "I'm sure I won't like it, I only like real dicks inside of me, and besides, I don't like them that big." Finally we found a time to use it.
I'm not sure how deep-vagina'd the people that were having issues with the lock scraping the woman, but I don't think she ever got within an inch of where the lock would be and with most of her thrusts when she rode it, I felt G-spot impact against her vaginal wall before she was even two inches from the base.
I always try to pay very close attention to the woman while having sex. I check her breathing patterns, watch for sudden inhalation/exhalation when I hit certain spots, monitor where the air is being pushed from when she moans (head/throat/chest/diaphragm), and try to keep track of her internal muscle spasms so I know when to back off and when to go in hard and fast. Her Delight made this even easier since I didn't have to try and keep from cumming... I just had to direct its aim and meet her thrusts with mine.
What I noticed when we used Her Delight... is that she was moaning from deeper than ever before. Her orgasms were intense and much more frequent. Her eyes looked through me instead of at me... as she was completely in the zone and it was like I wasn't even there. It took roughly 45 minutes before she collapsed in exhaustion (this would usually take 1.5-3 hours with normal sex) and she was panting and sweating with a huge grin on her face... she was absolutely glowing. She lay there cooing for about 15 minutes before unlocking my wrist restraints. She just said "let's take a shower."
In the shower we made out and I could tell she was still turned on but completely satiated while she started to twist my nipples and ordered me to jerk off. After I came we kissed and hugged and her eyes were tearing up a bit. I asked her if she enjoyed it but she didn't answer. I told her it was okay to tell me and it turned me on to see her orgasm that hard. She then told me she hadn't said anything because she didn't want to hurt my feelings and that started an odd cycle of giving feedback while trying to be as nice as possible:
"Honestly... I loved it. I still prefer the intimacy of real sex though. I don't think I've cum that hard before, but I still prefer the feel of a real penis."
I replied with, "it's better when it's really big, isn't it?" She just nodded and looked sad, like she had hurt me. Almost immediately I had another throbbing hard on even though I had just came several minutes ago. I whispered in her ear, "it's okay, I loved seeing you orgasm that hard, it makes me happy. And besides... it turns me on to hear that." I went down on her and we were in the shower a long time. It's true that it wasn't flesh and blood, but it was still very intimate.
Sadly, we only used Her Delight once more and haven't touched it since.
I still haven't quite figured out the exact subspace trigger here but I think it was a combination of things:
-I was basically reduced to the role of a dildo stand.
-The feelings of shame and inadequacy being out shined by the intensity of her orgasms but then looping back on itself since she orgasmed harder when it wasn't really me.
-The emasculation by her attempts to avoid saying she liked it better even though I knew that was true.
Who knows? It's kind of strange that it was discontinued because women complained it was too big in both length and girth but this also happened to be why it worked well for us and why it remains such a vivid memory to me.