CanuckInNJ wrote:
Any break-ups, or walk-outs, or demands for sex therapy/couples therapy/psychiatric treatment?

That hasn't happened to me - orgasm control has deepened communication, emotional intimacy and sexual intimacy in our relationship - and I can see it happening.
Walk-outs? Demands for sex therapy / psychiatric treatment? You've uncovered a faultline in the relationship about trust, maybe expectations, maybe base disagreements on how needs are being met. Maybe you never talked about needs and don't know your SO's needs. Those would be good to know about.
Couples therapy demands would likely stem from the same faultline, but now there's hope. With a good, kink-friendly therapist - insist on one - it's possible to work on showing feelings and vulnerability and know you'll each be heard. So now needs can be discussed, and wants. That can be a very rewarding, if work-intensive, path.
Break-ups -- that could always happen. If it's an ugly breakup, that's our friend the faultline again. And, any time needs or wants are discussed that have never been discussed before in a relationship, you run the risk of finding out you're incompatible. You were incompatible before, just now you know, and you might decide to break it up. No one's fault, you're just not a good fit.
As painful as that can be, I actually see it as a positive.
No matter what, I see a more open discussion of each other's wants and needs as a positive. Yes that makes you vulnerable and yes that's risky. That's where the added intimacy comes from by the way: I showed myself to you, honestly, vulnerably, and you accepted and embraced me as I am. How awesome. And that goes both ways, not just with your kinks and needs and wants, but theirs as well.