My wife and I decided to try this a few weeks ago. She was somewhat skeptical at first (neither one of us are seriously into BDSM stuff) but now she wishes we'd got this when we first married!! It's just the best sex toy ever!! Talk about foreplay lasting for days at a time!! I am so horny all the time now it's incredible. There's no room for any kind of movement in the CB3000 for me. I've tried miserably to masturbate somehow but it's impossible. I can't get any kind of erection or even touch myself unless my wife allows it. It's exquisite and VERY arousing! She is having so much fun teasing me. She knows now that she and only she can decide when I get let out and give her the best seeing to she's ever had. She'll then immediately lock me back in!!
We use either playing cards or dice to decide the "minimum" lock up time (in days). Even after that time, there is no guarantee she'll let me out. I am constantly like a love-struck teenager and worshipping the ground she walks on. I don't even look at other women now. My wife is like a Goddess to me while she wears that key around her neck.
FYI: If you purchase this item and find that it's not quite secure (possibility that you can pull out) - consider getting the Points of Intrigue for it. Although I found even the smallest POI set to be uncomfortable for everyday wear, I sanded the points down until I found that I was totally secure but also comfortable enough for 24/7 wear. Also use plenty of baby powder around the cuff ring to avoid chaffing from nocturnal erection attempts.